/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:36:58,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:36:58,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:36:58,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:36:58,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:36:58,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:36:58,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:36:58,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:36:58,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:36:58,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:36:58,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:36:58,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:36:58,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:36:58,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:36:58,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:36:58,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:36:58,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:36:58,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:36:58,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:36:58,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:36:58,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:36:58,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:36:58,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:36:58,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:36:58,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 11:36:58,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 11:36:58,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 11:36:58,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 11:36:58,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 11:36:58,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 11:36:58,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:36:58,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:36:58,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:36:58,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:36:58,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:36:58,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:36:58,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:36:58,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:36:58,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:36:58,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:36:58,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:36:58,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:36:58,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:36:58,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:36:58,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:36:58,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:36:58,822 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:36:58,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:36:58,822 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:36:58,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:36:58,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:36:58,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:36:58,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:36:58,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:36:58,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:36:58,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:36:58,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:36:58,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:36:58,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:36:58,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:36:58,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:36:58,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:36:58,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:36:58,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:36:58,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:36:58,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:36:58,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:36:58,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:36:58,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:36:58,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:36:58,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:36:59,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:36:59,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:36:59,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:36:59,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:36:59,200 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:36:59,201 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-16 11:36:59,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ead605c0/19f1ed8b80c34c12920ab483e40968a8/FLAG8374905eb [2020-10-16 11:36:59,819 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:36:59,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-16 11:36:59,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ead605c0/19f1ed8b80c34c12920ab483e40968a8/FLAG8374905eb [2020-10-16 11:37:00,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ead605c0/19f1ed8b80c34c12920ab483e40968a8 [2020-10-16 11:37:00,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:37:00,136 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:37:00,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:37:00,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:37:00,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d418a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00, skipping insertion in model container [2020-10-16 11:37:00,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:37:00,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:37:00,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,709 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:37:00,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,853 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:37:00,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00 WrapperNode [2020-10-16 11:37:00,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:37:00,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:37:00,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:37:00,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:37:00,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:37:00,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:37:00,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:37:00,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:37:00,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:37:00,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:37:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:37:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:37:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:37:01,016 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:37:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:37:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:37:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:37:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:37:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:37:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:37:01,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:37:01,019 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:37:01,324 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:37:01,324 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:37:01,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01 BoogieIcfgContainer [2020-10-16 11:37:01,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:37:01,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:37:01,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:37:01,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:37:01,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:37:00" (1/3) ... [2020-10-16 11:37:01,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b71e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (2/3) ... [2020-10-16 11:37:01,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b71e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01" (3/3) ... [2020-10-16 11:37:01,337 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-10-16 11:37:01,354 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:37:01,354 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:37:01,364 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:37:01,365 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:37:01,394 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,395 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,395 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,395 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,396 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,396 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,396 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,397 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,397 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,397 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,398 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,398 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,400 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,400 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,400 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,400 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,401 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,402 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,403 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,403 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,403 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,403 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,416 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,416 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,417 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,417 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,417 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,417 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,420 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:37:01,435 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:37:01,459 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:01,459 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:01,460 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:01,460 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:01,460 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:01,460 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:01,460 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:01,461 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:01,473 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:01,474 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,477 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,479 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,538 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-16 11:37:01,540 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:37:01,549 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 11:37:01,553 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-16 11:37:02,600 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-16 11:37:02,672 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-16 11:37:02,673 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-16 11:37:02,680 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-16 11:37:02,692 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:37:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:37:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:37:02,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:02,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:37:02,704 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:02,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-16 11:37:02,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:02,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756649110] [2020-10-16 11:37:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:02,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756649110] [2020-10-16 11:37:02,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:02,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:02,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671094015] [2020-10-16 11:37:02,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:02,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:02,967 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:37:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,039 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-16 11:37:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:03,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:37:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,054 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:37:03,055 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:37:03,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:37:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-16 11:37:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:37:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-16 11:37:03,102 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-16 11:37:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,103 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-16 11:37:03,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-16 11:37:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:37:03,105 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-16 11:37:03,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130689660] [2020-10-16 11:37:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130689660] [2020-10-16 11:37:03,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21719702] [2020-10-16 11:37:03,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,233 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-16 11:37:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,285 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-16 11:37:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,288 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:37:03,288 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:37:03,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:37:03,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-16 11:37:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:37:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 11:37:03,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-16 11:37:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,300 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 11:37:03,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 11:37:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:37:03,302 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,302 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-16 11:37:03,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792470612] [2020-10-16 11:37:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792470612] [2020-10-16 11:37:03,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584486704] [2020-10-16 11:37:03,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,372 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-16 11:37:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,398 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-16 11:37:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:03,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,400 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:37:03,401 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:37:03,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:37:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 11:37:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:37:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-16 11:37:03,410 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-16 11:37:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,411 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-16 11:37:03,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-16 11:37:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:37:03,412 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-16 11:37:03,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23676129] [2020-10-16 11:37:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23676129] [2020-10-16 11:37:03,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401272258] [2020-10-16 11:37:03,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,520 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-16 11:37:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,579 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-16 11:37:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,581 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:37:03,581 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:37:03,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:03,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:37:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-16 11:37:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:37:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-16 11:37:03,590 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-16 11:37:03,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,590 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-16 11:37:03,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-16 11:37:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:03,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,592 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:37:03,592 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-16 11:37:03,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335041463] [2020-10-16 11:37:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335041463] [2020-10-16 11:37:03,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206705471] [2020-10-16 11:37:03,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:03,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:03,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:03,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:03,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 11:37:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121309052] [2020-10-16 11:37:03,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:03,821 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-16 11:37:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,887 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-16 11:37:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:03,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-16 11:37:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,889 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:37:03,889 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:37:03,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:37:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-16 11:37:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:37:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-16 11:37:03,897 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-16 11:37:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,898 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-16 11:37:03,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-16 11:37:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:03,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,899 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,113 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-16 11:37:04,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884418828] [2020-10-16 11:37:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884418828] [2020-10-16 11:37:04,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400463307] [2020-10-16 11:37:04,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:04,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:04,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939176926] [2020-10-16 11:37:04,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:04,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:04,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,328 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-16 11:37:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,359 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 11:37:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:04,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,360 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:37:04,360 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:37:04,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:37:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-16 11:37:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:37:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-16 11:37:04,368 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-16 11:37:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,368 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-16 11:37:04,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-16 11:37:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,370 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,584 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-16 11:37:04,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359258517] [2020-10-16 11:37:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359258517] [2020-10-16 11:37:04,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005115149] [2020-10-16 11:37:04,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:04,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157844132] [2020-10-16 11:37:04,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:04,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,807 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-16 11:37:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,860 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-16 11:37:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:04,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,862 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:37:04,863 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:37:04,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:37:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-16 11:37:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:37:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-16 11:37:04,882 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-16 11:37:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,883 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-16 11:37:04,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-16 11:37:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,884 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,085 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-16 11:37:05,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546357502] [2020-10-16 11:37:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546357502] [2020-10-16 11:37:05,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075797350] [2020-10-16 11:37:05,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:05,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:05,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:05,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700893799] [2020-10-16 11:37:05,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:05,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:05,270 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-16 11:37:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,367 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 11:37:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:05,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,368 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:37:05,369 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:37:05,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:37:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-16 11:37:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:37:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 11:37:05,375 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-16 11:37:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,375 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 11:37:05,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 11:37:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,591 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-16 11:37:05,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862959077] [2020-10-16 11:37:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862959077] [2020-10-16 11:37:05,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134033265] [2020-10-16 11:37:05,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,653 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-16 11:37:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,680 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-16 11:37:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:05,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:05,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,682 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:37:05,682 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:37:05,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:37:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-16 11:37:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:37:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-16 11:37:05,688 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-16 11:37:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,688 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-16 11:37:05,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-16 11:37:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 11:37:05,690 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-16 11:37:05,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783533531] [2020-10-16 11:37:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783533531] [2020-10-16 11:37:05,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263918113] [2020-10-16 11:37:05,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,756 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-16 11:37:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,820 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-16 11:37:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:05,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,822 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:37:05,822 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:37:05,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:37:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-16 11:37:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:37:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-16 11:37:05,834 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-16 11:37:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,834 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-16 11:37:05,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-16 11:37:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 11:37:05,836 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-16 11:37:05,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346011827] [2020-10-16 11:37:05,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346011827] [2020-10-16 11:37:05,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350534185] [2020-10-16 11:37:05,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,930 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-16 11:37:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,004 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 11:37:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:06,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,006 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:06,006 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:06,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-16 11:37:06,011 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-16 11:37:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,011 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-16 11:37:06,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-16 11:37:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-16 11:37:06,013 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-16 11:37:06,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726036796] [2020-10-16 11:37:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726036796] [2020-10-16 11:37:06,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:06,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:06,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449657245] [2020-10-16 11:37:06,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:06,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:06,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:06,098 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-16 11:37:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,177 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 11:37:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:06,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,178 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:06,179 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:06,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-16 11:37:06,185 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-16 11:37:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,185 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-16 11:37:06,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-16 11:37:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,187 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 11:37:06,187 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-16 11:37:06,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099522330] [2020-10-16 11:37:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099522330] [2020-10-16 11:37:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726462856] [2020-10-16 11:37:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:06,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:06,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:06,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-16 11:37:06,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69704548] [2020-10-16 11:37:06,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:06,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:06,490 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-16 11:37:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,596 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-16 11:37:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:06,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-16 11:37:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,598 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:06,598 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:37:06,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:37:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-16 11:37:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:37:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-16 11:37:06,604 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-16 11:37:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,605 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-16 11:37:06,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-16 11:37:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,606 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:37:06,817 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-16 11:37:06,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521036760] [2020-10-16 11:37:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521036760] [2020-10-16 11:37:06,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480453475] [2020-10-16 11:37:06,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:06,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:06,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:06,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619804835] [2020-10-16 11:37:07,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,040 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-16 11:37:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:07,082 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:37:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:07,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:07,084 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:37:07,084 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:37:07,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:37:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 11:37:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:37:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-16 11:37:07,088 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-16 11:37:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:07,089 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-16 11:37:07,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-16 11:37:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:07,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:07,090 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,291 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-16 11:37:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549940478] [2020-10-16 11:37:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549940478] [2020-10-16 11:37:07,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760320556] [2020-10-16 11:37:07,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802869129] [2020-10-16 11:37:07,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,507 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-16 11:37:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:07,578 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-16 11:37:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:07,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:07,579 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:37:07,579 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:37:07,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:37:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-16 11:37:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:37:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-16 11:37:07,585 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-16 11:37:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:07,585 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-16 11:37:07,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-16 11:37:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:07,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:07,586 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:37:07,799 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-16 11:37:07,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657700784] [2020-10-16 11:37:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657700784] [2020-10-16 11:37:07,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143171773] [2020-10-16 11:37:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:08,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:08,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699684187] [2020-10-16 11:37:08,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:08,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:08,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:08,045 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-16 11:37:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:08,136 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-16 11:37:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:08,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:08,137 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:37:08,138 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:37:08,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:37:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-16 11:37:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-16 11:37:08,145 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-16 11:37:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,146 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-16 11:37:08,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-16 11:37:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:08,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,147 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:37:08,349 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-16 11:37:08,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103042683] [2020-10-16 11:37:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103042683] [2020-10-16 11:37:08,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287484914] [2020-10-16 11:37:08,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:08,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:08,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:08,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:08,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:08,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:08,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238422012] [2020-10-16 11:37:08,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:08,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:08,563 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-16 11:37:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:08,675 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-16 11:37:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:08,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:08,677 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:37:08,677 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:37:08,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:37:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-16 11:37:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-16 11:37:08,683 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-16 11:37:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,683 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-16 11:37:08,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-16 11:37:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:08,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,684 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:37:08,897 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-16 11:37:08,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054955675] [2020-10-16 11:37:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054955675] [2020-10-16 11:37:08,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711619695] [2020-10-16 11:37:08,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:09,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:09,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158777437] [2020-10-16 11:37:09,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,107 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-16 11:37:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,152 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-16 11:37:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:09,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,154 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:37:09,154 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:37:09,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:37:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-16 11:37:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 11:37:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-16 11:37:09,158 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-16 11:37:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,159 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-16 11:37:09,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-16 11:37:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,160 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:37:09,370 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-16 11:37:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907710642] [2020-10-16 11:37:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907710642] [2020-10-16 11:37:09,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84095476] [2020-10-16 11:37:09,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:09,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:09,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:09,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003483399] [2020-10-16 11:37:09,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,568 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-16 11:37:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,657 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-16 11:37:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:09,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,659 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:37:09,660 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:37:09,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:37:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-16 11:37:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 11:37:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-16 11:37:09,665 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-16 11:37:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,665 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-16 11:37:09,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-16 11:37:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,666 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:09,879 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-16 11:37:09,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329141165] [2020-10-16 11:37:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329141165] [2020-10-16 11:37:09,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067441508] [2020-10-16 11:37:09,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466789093] [2020-10-16 11:37:10,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,074 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-16 11:37:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,146 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-16 11:37:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:10,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,148 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:37:10,148 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:37:10,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:37:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-16 11:37:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-16 11:37:10,153 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-16 11:37:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,153 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-16 11:37:10,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-16 11:37:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,154 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,365 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-16 11:37:10,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047742463] [2020-10-16 11:37:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047742463] [2020-10-16 11:37:10,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612338616] [2020-10-16 11:37:10,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:10,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:10,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124912822] [2020-10-16 11:37:10,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,602 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-16 11:37:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,672 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-16 11:37:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:10,673 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,674 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:10,674 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:37:10,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:37:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-16 11:37:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 11:37:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-16 11:37:10,679 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-16 11:37:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,681 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-16 11:37:10,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-16 11:37:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,682 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 11:37:10,882 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-16 11:37:10,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834324974] [2020-10-16 11:37:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834324974] [2020-10-16 11:37:10,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748591432] [2020-10-16 11:37:10,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:11,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075185089] [2020-10-16 11:37:11,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,117 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:11,207 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-16 11:37:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:11,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:11,209 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:11,209 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:11,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 11:37:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-16 11:37:11,213 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-16 11:37:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:11,213 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-16 11:37:11,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-16 11:37:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:11,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:11,214 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,424 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-16 11:37:11,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774578890] [2020-10-16 11:37:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774578890] [2020-10-16 11:37:11,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953935364] [2020-10-16 11:37:11,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378654396] [2020-10-16 11:37:11,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,611 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-16 11:37:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:11,692 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:37:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:11,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:11,694 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:11,694 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:11,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-16 11:37:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 11:37:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-16 11:37:11,699 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-16 11:37:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:11,700 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-16 11:37:11,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-16 11:37:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:11,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:11,703 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:37:11,903 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-16 11:37:11,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627044105] [2020-10-16 11:37:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627044105] [2020-10-16 11:37:11,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183221181] [2020-10-16 11:37:11,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:12,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:12,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637434158] [2020-10-16 11:37:12,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,158 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-16 11:37:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:12,327 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 11:37:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:12,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:12,329 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:37:12,331 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:37:12,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:37:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-16 11:37:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 11:37:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-16 11:37:12,341 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-16 11:37:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:12,341 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-16 11:37:12,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-16 11:37:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:12,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:12,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:12,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,546 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-16 11:37:12,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:12,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595886832] [2020-10-16 11:37:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595886832] [2020-10-16 11:37:12,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015299508] [2020-10-16 11:37:12,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:12,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:12,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515359899] [2020-10-16 11:37:12,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,749 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:12,843 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 11:37:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:12,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:12,844 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:37:12,845 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:37:12,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:37:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-16 11:37:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:12,849 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:12,850 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:12,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:12,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:12,850 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:37:13,061 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-16 11:37:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466185715] [2020-10-16 11:37:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466185715] [2020-10-16 11:37:13,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949051760] [2020-10-16 11:37:13,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:13,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:13,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:13,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:13,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347943752] [2020-10-16 11:37:13,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:13,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:13,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:13,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:13,250 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:13,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:13,436 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-16 11:37:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:13,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:13,438 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:37:13,438 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:13,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-16 11:37:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:13,443 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:13,443 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:13,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:13,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:13,445 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:37:13,656 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-16 11:37:13,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830052492] [2020-10-16 11:37:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830052492] [2020-10-16 11:37:13,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262368355] [2020-10-16 11:37:13,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:13,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:13,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:13,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:13,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:13,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:13,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:13,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098975150] [2020-10-16 11:37:13,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:13,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:13,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:13,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:13,935 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,077 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 11:37:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:14,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,079 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:37:14,079 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:37:14,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:37:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 11:37:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-16 11:37:14,083 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-16 11:37:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,084 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-16 11:37:14,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-16 11:37:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,085 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 11:37:14,286 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-16 11:37:14,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024001365] [2020-10-16 11:37:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024001365] [2020-10-16 11:37:14,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33164083] [2020-10-16 11:37:14,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:14,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:14,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834949145] [2020-10-16 11:37:14,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,434 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-16 11:37:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,543 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-16 11:37:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:14,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,546 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:37:14,546 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:37:14,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:37:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-16 11:37:14,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:14,551 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,551 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:14,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,552 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:37:14,762 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-16 11:37:14,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150712517] [2020-10-16 11:37:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150712517] [2020-10-16 11:37:14,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400787944] [2020-10-16 11:37:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:14,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:14,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699204908] [2020-10-16 11:37:14,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,942 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:15,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,080 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-16 11:37:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:15,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,082 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:37:15,082 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:37:15,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:37:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-16 11:37:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:15,086 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,087 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:15,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,088 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:15,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:37:15,289 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-16 11:37:15,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:15,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713725651] [2020-10-16 11:37:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713725651] [2020-10-16 11:37:15,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499605814] [2020-10-16 11:37:15,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:15,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:15,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:15,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:15,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:15,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692341533] [2020-10-16 11:37:15,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:15,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:15,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:15,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:15,472 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,612 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-16 11:37:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:15,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,614 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:37:15,614 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:37:15,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:37:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-16 11:37:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:15,619 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,619 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:15,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,620 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:15,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:15,821 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-16 11:37:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:15,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959184427] [2020-10-16 11:37:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959184427] [2020-10-16 11:37:15,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756625858] [2020-10-16 11:37:15,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:15,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:15,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:15,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:16,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:16,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585111572] [2020-10-16 11:37:16,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:16,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:16,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:16,001 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:16,214 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-16 11:37:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:16,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:16,216 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:16,216 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 11:37:16,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 11:37:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-16 11:37:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:16,221 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:16,221 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:16,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:16,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:16,222 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:16,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-16 11:37:16,433 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-16 11:37:16,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:16,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924856728] [2020-10-16 11:37:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924856728] [2020-10-16 11:37:16,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210512602] [2020-10-16 11:37:16,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:16,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:16,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:16,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389832920] [2020-10-16 11:37:16,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:16,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:16,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:16,602 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:16,824 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-16 11:37:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:16,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:16,827 INFO L225 Difference]: With dead ends: 135 [2020-10-16 11:37:16,827 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:37:16,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:16,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:37:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-16 11:37:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-16 11:37:16,834 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-16 11:37:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:16,835 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-16 11:37:16,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-16 11:37:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:16,836 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:17,037 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-16 11:37:17,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905191205] [2020-10-16 11:37:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905191205] [2020-10-16 11:37:17,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309849761] [2020-10-16 11:37:17,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:17,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:17,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:17,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:17,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:17,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-16 11:37:17,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537314113] [2020-10-16 11:37:17,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:37:17,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:37:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:17,241 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-16 11:37:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:17,352 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-16 11:37:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:17,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-16 11:37:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:17,353 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:17,353 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:37:17,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:37:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-16 11:37:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 11:37:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-16 11:37:17,358 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-16 11:37:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:17,358 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-16 11:37:17,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:37:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-16 11:37:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:17,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:17,359 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 11:37:17,572 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-16 11:37:17,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2573910] [2020-10-16 11:37:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2573910] [2020-10-16 11:37:17,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856016325] [2020-10-16 11:37:17,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:17,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:17,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:17,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:17,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:17,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079377233] [2020-10-16 11:37:17,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:17,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:17,797 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-16 11:37:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:17,839 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-16 11:37:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:17,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:17,841 INFO L225 Difference]: With dead ends: 132 [2020-10-16 11:37:17,841 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:37:17,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:37:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-16 11:37:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:17,845 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:17,845 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:17,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:17,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:17,846 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:18,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:37:18,055 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:18,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:18,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-16 11:37:18,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:18,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069347805] [2020-10-16 11:37:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069347805] [2020-10-16 11:37:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354808794] [2020-10-16 11:37:18,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:18,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:18,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682600190] [2020-10-16 11:37:18,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,277 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,334 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-16 11:37:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:18,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,336 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:18,336 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 11:37:18,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 11:37:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-16 11:37:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:18,341 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,341 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:18,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,342 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:18,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 11:37:18,552 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-16 11:37:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:18,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524632276] [2020-10-16 11:37:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524632276] [2020-10-16 11:37:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125693155] [2020-10-16 11:37:18,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:18,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383480895] [2020-10-16 11:37:18,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,780 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,865 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-16 11:37:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:18,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,868 INFO L225 Difference]: With dead ends: 142 [2020-10-16 11:37:18,868 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 11:37:18,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 11:37:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-16 11:37:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-16 11:37:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-16 11:37:18,873 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-16 11:37:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,873 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-16 11:37:18,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-16 11:37:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,874 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:19,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:37:19,085 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:19,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-16 11:37:19,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:19,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009271386] [2020-10-16 11:37:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009271386] [2020-10-16 11:37:19,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933111707] [2020-10-16 11:37:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932421603] [2020-10-16 11:37:19,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,317 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-16 11:37:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:19,419 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-16 11:37:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:19,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:19,421 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:37:19,421 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:37:19,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:37:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-16 11:37:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-16 11:37:19,425 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-16 11:37:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:19,425 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-16 11:37:19,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-16 11:37:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:19,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:19,426 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:19,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:37:19,637 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-16 11:37:19,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:19,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124842504] [2020-10-16 11:37:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124842504] [2020-10-16 11:37:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750082267] [2020-10-16 11:37:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:19,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:19,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:19,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297594908] [2020-10-16 11:37:19,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,894 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,081 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:20,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,084 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:20,084 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 11:37:20,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 11:37:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-16 11:37:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-16 11:37:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-16 11:37:20,091 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-16 11:37:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,091 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-16 11:37:20,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-16 11:37:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:20,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,092 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,301 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-16 11:37:20,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086290174] [2020-10-16 11:37:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086290174] [2020-10-16 11:37:20,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462531575] [2020-10-16 11:37:20,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:20,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:20,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:20,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925619366] [2020-10-16 11:37:20,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:20,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:20,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,515 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,585 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-16 11:37:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:20,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,587 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:37:20,587 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:20,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-16 11:37:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-16 11:37:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-16 11:37:20,591 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-16 11:37:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,591 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-16 11:37:20,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-16 11:37:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:20,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:37:20,801 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-16 11:37:20,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061356543] [2020-10-16 11:37:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061356543] [2020-10-16 11:37:20,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946745441] [2020-10-16 11:37:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:20,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205229085] [2020-10-16 11:37:21,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,074 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,216 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 11:37:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:21,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,219 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:21,219 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 11:37:21,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 11:37:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-16 11:37:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-16 11:37:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-16 11:37:21,225 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-16 11:37:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,225 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-16 11:37:21,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-16 11:37:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:37:21,439 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-16 11:37:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474663108] [2020-10-16 11:37:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474663108] [2020-10-16 11:37:21,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737460524] [2020-10-16 11:37:21,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:21,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:21,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882386316] [2020-10-16 11:37:21,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,636 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-16 11:37:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,761 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:21,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,764 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:21,764 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 11:37:21,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 11:37:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-16 11:37:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 11:37:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-16 11:37:21,767 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-16 11:37:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,767 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-16 11:37:21,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-16 11:37:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:21,977 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-16 11:37:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234344495] [2020-10-16 11:37:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234344495] [2020-10-16 11:37:22,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854570487] [2020-10-16 11:37:22,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:22,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:22,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:22,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758500306] [2020-10-16 11:37:22,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,199 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:22,339 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-16 11:37:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:22,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:22,341 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:37:22,341 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 11:37:22,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 11:37:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-16 11:37:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:22,345 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:22,345 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:22,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:22,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:22,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:22,346 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:22,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:37:22,555 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:22,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-16 11:37:22,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:22,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007852718] [2020-10-16 11:37:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007852718] [2020-10-16 11:37:22,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494468895] [2020-10-16 11:37:22,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:22,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:22,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:22,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820252385] [2020-10-16 11:37:22,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,754 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:22,882 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-16 11:37:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:22,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:22,884 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:22,884 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:22,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-16 11:37:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-16 11:37:22,893 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-16 11:37:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:22,895 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-16 11:37:22,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-16 11:37:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:22,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:22,896 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:23,102 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-16 11:37:23,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517473219] [2020-10-16 11:37:23,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517473219] [2020-10-16 11:37:23,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949813457] [2020-10-16 11:37:23,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:23,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507760006] [2020-10-16 11:37:23,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:23,346 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-16 11:37:23,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,415 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-16 11:37:23,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:23,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,417 INFO L225 Difference]: With dead ends: 152 [2020-10-16 11:37:23,417 INFO L226 Difference]: Without dead ends: 150 [2020-10-16 11:37:23,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-16 11:37:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-16 11:37:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-16 11:37:23,422 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-16 11:37:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,423 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-16 11:37:23,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-16 11:37:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:23,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:37:23,638 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-16 11:37:23,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146301616] [2020-10-16 11:37:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146301616] [2020-10-16 11:37:23,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568441917] [2020-10-16 11:37:23,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:23,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:23,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:23,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:23,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885887028] [2020-10-16 11:37:23,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:23,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:23,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:23,880 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-16 11:37:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,015 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-16 11:37:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:24,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,019 INFO L225 Difference]: With dead ends: 153 [2020-10-16 11:37:24,019 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 11:37:24,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 11:37:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-16 11:37:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:24,023 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,024 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:24,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 11:37:24,233 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-16 11:37:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168137001] [2020-10-16 11:37:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168137001] [2020-10-16 11:37:24,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160902983] [2020-10-16 11:37:24,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:24,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:24,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:24,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:24,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:24,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:24,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562779662] [2020-10-16 11:37:24,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:24,430 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,574 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:24,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,576 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:24,576 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:24,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:24,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-16 11:37:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-16 11:37:24,581 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-16 11:37:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,581 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-16 11:37:24,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-16 11:37:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,582 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:37:24,793 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-16 11:37:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982608247] [2020-10-16 11:37:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982608247] [2020-10-16 11:37:24,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506555837] [2020-10-16 11:37:24,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:24,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:24,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:25,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166503744] [2020-10-16 11:37:25,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:25,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:25,009 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,089 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-16 11:37:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:25,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,091 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:37:25,091 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 11:37:25,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 11:37:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-16 11:37:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:25,097 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,097 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:25,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:25,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 11:37:25,310 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:25,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-16 11:37:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:25,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482596630] [2020-10-16 11:37:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482596630] [2020-10-16 11:37:25,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87705083] [2020-10-16 11:37:25,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:25,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:25,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406019196] [2020-10-16 11:37:25,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:25,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:25,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:25,557 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,711 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-16 11:37:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:25,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,713 INFO L225 Difference]: With dead ends: 157 [2020-10-16 11:37:25,714 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 11:37:25,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 11:37:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-16 11:37:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-16 11:37:25,717 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-16 11:37:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,718 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-16 11:37:25,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-16 11:37:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,719 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:25,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:25,930 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:25,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-16 11:37:25,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:25,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884613327] [2020-10-16 11:37:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884613327] [2020-10-16 11:37:25,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747162476] [2020-10-16 11:37:25,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:26,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:26,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050519947] [2020-10-16 11:37:26,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:26,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:26,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:26,132 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-16 11:37:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,238 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 11:37:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:26,238 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,240 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:26,240 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:26,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-16 11:37:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:26,244 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:26,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,245 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:26,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:26,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,246 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:37:26,453 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-16 11:37:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987566208] [2020-10-16 11:37:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987566208] [2020-10-16 11:37:26,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058464819] [2020-10-16 11:37:26,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:26,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934591848] [2020-10-16 11:37:26,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:26,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:26,670 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,921 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-16 11:37:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:26,922 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,923 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:26,923 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:26,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-16 11:37:26,927 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-16 11:37:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,927 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-16 11:37:26,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-16 11:37:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:26,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:37:27,139 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-16 11:37:27,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099666806] [2020-10-16 11:37:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099666806] [2020-10-16 11:37:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176221180] [2020-10-16 11:37:27,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:27,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:27,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:27,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936025017] [2020-10-16 11:37:27,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:27,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:27,355 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:27,534 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:27,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:27,536 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:27,536 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:27,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-16 11:37:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:27,540 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:27,541 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:27,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:27,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:27,542 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:27,752 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-16 11:37:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021190070] [2020-10-16 11:37:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021190070] [2020-10-16 11:37:27,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293012730] [2020-10-16 11:37:27,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:27,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:27,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:27,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:27,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:27,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:27,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071301854] [2020-10-16 11:37:27,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:27,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:27,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:27,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:27,979 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:28,347 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-16 11:37:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:28,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:28,349 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:28,349 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 11:37:28,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:37:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 11:37:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-16 11:37:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:28,354 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:28,354 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:28,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:28,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:28,355 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:28,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-16 11:37:28,565 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-16 11:37:28,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:28,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661968100] [2020-10-16 11:37:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661968100] [2020-10-16 11:37:28,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841282951] [2020-10-16 11:37:28,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:28,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:28,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:28,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:28,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:28,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046560915] [2020-10-16 11:37:28,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:28,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:28,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:28,791 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,050 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-16 11:37:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:29,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,052 INFO L225 Difference]: With dead ends: 166 [2020-10-16 11:37:29,052 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:29,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-16 11:37:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-16 11:37:29,056 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-16 11:37:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,057 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-16 11:37:29,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-16 11:37:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:29,267 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-16 11:37:29,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130937183] [2020-10-16 11:37:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130937183] [2020-10-16 11:37:29,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492183585] [2020-10-16 11:37:29,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:29,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:29,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:29,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:29,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343942716] [2020-10-16 11:37:29,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:29,481 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,683 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-16 11:37:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:29,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,685 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:29,685 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:29,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-16 11:37:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-16 11:37:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-16 11:37:29,689 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-16 11:37:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,689 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-16 11:37:29,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-16 11:37:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:37:29,891 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-16 11:37:29,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455554514] [2020-10-16 11:37:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455554514] [2020-10-16 11:37:29,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431337213] [2020-10-16 11:37:29,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:29,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:29,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:29,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208843901] [2020-10-16 11:37:30,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,077 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,336 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-16 11:37:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:30,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,338 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:37:30,339 INFO L226 Difference]: Without dead ends: 168 [2020-10-16 11:37:30,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-16 11:37:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-16 11:37:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 11:37:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-16 11:37:30,342 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-16 11:37:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,343 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-16 11:37:30,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-16 11:37:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:30,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,343 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:30,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:30,544 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-16 11:37:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147539479] [2020-10-16 11:37:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147539479] [2020-10-16 11:37:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125491221] [2020-10-16 11:37:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576686891] [2020-10-16 11:37:30,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,745 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-16 11:37:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,034 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 11:37:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:31,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,036 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:31,036 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:31,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-16 11:37:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-16 11:37:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-16 11:37:31,041 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-16 11:37:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,041 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-16 11:37:31,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-16 11:37:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:31,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:37:31,254 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-16 11:37:31,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:31,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031902736] [2020-10-16 11:37:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031902736] [2020-10-16 11:37:31,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130600142] [2020-10-16 11:37:31,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:31,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:31,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:31,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:31,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:31,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083904178] [2020-10-16 11:37:31,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:31,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:31,453 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-16 11:37:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,831 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-16 11:37:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:31,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,834 INFO L225 Difference]: With dead ends: 190 [2020-10-16 11:37:31,834 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:31,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:37:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-16 11:37:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-16 11:37:31,837 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-16 11:37:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,837 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-16 11:37:31,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-16 11:37:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:37:32,039 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-16 11:37:32,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171693526] [2020-10-16 11:37:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171693526] [2020-10-16 11:37:32,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631918554] [2020-10-16 11:37:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:32,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:32,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:32,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:32,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159214924] [2020-10-16 11:37:32,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:32,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:32,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:32,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:32,219 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-16 11:37:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:32,556 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-16 11:37:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:32,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:32,558 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:37:32,558 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:32,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-16 11:37:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-16 11:37:32,561 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-16 11:37:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:32,561 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-16 11:37:32,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-16 11:37:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:32,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:32,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:37:32,772 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-16 11:37:32,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828565264] [2020-10-16 11:37:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828565264] [2020-10-16 11:37:32,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068469764] [2020-10-16 11:37:32,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:32,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:32,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:32,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915855250] [2020-10-16 11:37:32,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:32,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:32,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:32,972 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-16 11:37:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,126 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-16 11:37:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:33,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,128 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:33,128 INFO L226 Difference]: Without dead ends: 162 [2020-10-16 11:37:33,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-16 11:37:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-16 11:37:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-16 11:37:33,132 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-16 11:37:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,133 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-16 11:37:33,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-16 11:37:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,134 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:33,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:37:33,337 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-16 11:37:33,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:33,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85453129] [2020-10-16 11:37:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85453129] [2020-10-16 11:37:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24366254] [2020-10-16 11:37:33,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:33,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:33,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:33,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:33,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:33,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:33,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736922709] [2020-10-16 11:37:33,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:33,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:33,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:33,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:33,527 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,696 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-16 11:37:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:33,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,698 INFO L225 Difference]: With dead ends: 161 [2020-10-16 11:37:33,698 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:33,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-16 11:37:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-16 11:37:33,703 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-16 11:37:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,703 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-16 11:37:33,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-16 11:37:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:33,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:37:33,916 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-16 11:37:33,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:33,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056251855] [2020-10-16 11:37:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056251855] [2020-10-16 11:37:33,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355216484] [2020-10-16 11:37:33,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:34,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:34,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:34,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499088072] [2020-10-16 11:37:34,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:34,122 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,316 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-16 11:37:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:34,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,319 INFO L225 Difference]: With dead ends: 165 [2020-10-16 11:37:34,319 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 11:37:34,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 11:37:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-16 11:37:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-16 11:37:34,323 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-16 11:37:34,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,323 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-16 11:37:34,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-16 11:37:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:34,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,324 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:34,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 11:37:34,525 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-16 11:37:34,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737964054] [2020-10-16 11:37:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737964054] [2020-10-16 11:37:34,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346845222] [2020-10-16 11:37:34,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:34,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967720032] [2020-10-16 11:37:34,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:34,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:34,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:34,715 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-16 11:37:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,892 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-16 11:37:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:34,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,894 INFO L225 Difference]: With dead ends: 167 [2020-10-16 11:37:34,894 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 11:37:34,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 11:37:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-16 11:37:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:34,898 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,898 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:34,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:34,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,109 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-16 11:37:35,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329225099] [2020-10-16 11:37:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329225099] [2020-10-16 11:37:35,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740555200] [2020-10-16 11:37:35,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:35,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986968118] [2020-10-16 11:37:35,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,296 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:35,557 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-16 11:37:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:35,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:35,559 INFO L225 Difference]: With dead ends: 168 [2020-10-16 11:37:35,559 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:35,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-16 11:37:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:35,563 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:35,564 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:35,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:35,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:35,565 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,773 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-16 11:37:35,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376292169] [2020-10-16 11:37:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376292169] [2020-10-16 11:37:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526364184] [2020-10-16 11:37:35,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135536464] [2020-10-16 11:37:35,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,959 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:36,156 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-16 11:37:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:36,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:36,157 INFO L225 Difference]: With dead ends: 160 [2020-10-16 11:37:36,158 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 11:37:36,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 11:37:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-16 11:37:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:36,160 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:36,161 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:36,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:36,162 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:36,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,362 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-16 11:37:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:36,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238604980] [2020-10-16 11:37:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238604980] [2020-10-16 11:37:36,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744466607] [2020-10-16 11:37:36,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:36,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:36,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:36,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:36,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:36,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:36,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567828282] [2020-10-16 11:37:36,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:36,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:36,611 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:37,028 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-16 11:37:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:37,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:37,031 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:37,031 INFO L226 Difference]: Without dead ends: 181 [2020-10-16 11:37:37,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-16 11:37:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-16 11:37:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:37,037 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:37,038 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:37,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:37,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:37,039 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:37,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:37,252 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-16 11:37:37,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:37,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966757495] [2020-10-16 11:37:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966757495] [2020-10-16 11:37:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41828060] [2020-10-16 11:37:37,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:37,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:37,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:37,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:37,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:37,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:37,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486108596] [2020-10-16 11:37:37,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:37,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:37,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:37,450 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:37,712 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-16 11:37:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:37,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:37,713 INFO L225 Difference]: With dead ends: 169 [2020-10-16 11:37:37,714 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 11:37:37,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 11:37:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-16 11:37:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:37,717 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:37,718 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:37,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:37,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:37,719 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:37,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-16 11:37:37,921 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-16 11:37:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:37,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070125143] [2020-10-16 11:37:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070125143] [2020-10-16 11:37:37,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144736149] [2020-10-16 11:37:37,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:38,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:38,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:38,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:38,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:38,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102728339] [2020-10-16 11:37:38,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:38,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:38,105 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:38,454 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-16 11:37:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:38,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:38,457 INFO L225 Difference]: With dead ends: 192 [2020-10-16 11:37:38,457 INFO L226 Difference]: Without dead ends: 184 [2020-10-16 11:37:38,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:37:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-16 11:37:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-16 11:37:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-16 11:37:38,460 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-16 11:37:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:38,460 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-16 11:37:38,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-16 11:37:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:38,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:38,461 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:38,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:38,670 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:38,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-16 11:37:38,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:38,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926686463] [2020-10-16 11:37:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926686463] [2020-10-16 11:37:38,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992821837] [2020-10-16 11:37:38,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:38,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:38,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:38,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787478382] [2020-10-16 11:37:38,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:38,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:38,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:38,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:38,863 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,206 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-16 11:37:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:39,207 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,208 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:37:39,208 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:39,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-16 11:37:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-16 11:37:39,212 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-16 11:37:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,212 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-16 11:37:39,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-16 11:37:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:39,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,213 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 11:37:39,416 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-16 11:37:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248292123] [2020-10-16 11:37:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248292123] [2020-10-16 11:37:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008933509] [2020-10-16 11:37:39,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:39,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:39,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:39,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:37:39,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361586467] [2020-10-16 11:37:39,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:37:39,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:39,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:37:39,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:39,674 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-16 11:37:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,818 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-16 11:37:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:39,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-16 11:37:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,820 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:39,820 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:39,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-16 11:37:39,824 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-16 11:37:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,824 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-16 11:37:39,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:37:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-16 11:37:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:39,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,825 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,036 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-16 11:37:40,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058698347] [2020-10-16 11:37:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058698347] [2020-10-16 11:37:40,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458153207] [2020-10-16 11:37:40,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:40,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:40,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903922039] [2020-10-16 11:37:40,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:40,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:40,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,318 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-16 11:37:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:40,366 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:40,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:40,368 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:40,368 INFO L226 Difference]: Without dead ends: 153 [2020-10-16 11:37:40,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-16 11:37:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-16 11:37:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:40,372 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,373 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:40,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:40,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,373 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 11:37:40,574 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-16 11:37:40,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137851033] [2020-10-16 11:37:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137851033] [2020-10-16 11:37:40,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591541476] [2020-10-16 11:37:40,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:40,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:40,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427575801] [2020-10-16 11:37:40,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,839 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:40,902 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-16 11:37:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:40,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:40,904 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:37:40,904 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 11:37:40,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 11:37:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-16 11:37:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:40,909 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,909 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:40,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:40,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,910 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:41,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,111 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-16 11:37:41,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:41,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562423355] [2020-10-16 11:37:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562423355] [2020-10-16 11:37:41,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654495358] [2020-10-16 11:37:41,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:41,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025491821] [2020-10-16 11:37:41,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:41,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:41,380 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,467 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-16 11:37:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:41,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,469 INFO L225 Difference]: With dead ends: 169 [2020-10-16 11:37:41,469 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:41,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-16 11:37:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:37:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-16 11:37:41,473 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-16 11:37:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,473 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-16 11:37:41,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-16 11:37:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:41,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,474 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:41,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,681 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-16 11:37:41,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:41,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510213261] [2020-10-16 11:37:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510213261] [2020-10-16 11:37:41,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033505296] [2020-10-16 11:37:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:41,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:41,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128266201] [2020-10-16 11:37:41,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:41,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:41,934 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-16 11:37:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:42,046 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-16 11:37:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:42,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:42,048 INFO L225 Difference]: With dead ends: 168 [2020-10-16 11:37:42,049 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 11:37:42,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 11:37:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-16 11:37:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-16 11:37:42,053 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-16 11:37:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:42,053 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-16 11:37:42,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-16 11:37:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:42,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:42,054 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:42,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 11:37:42,263 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-16 11:37:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141686506] [2020-10-16 11:37:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141686506] [2020-10-16 11:37:42,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168095193] [2020-10-16 11:37:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:42,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254520872] [2020-10-16 11:37:42,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:42,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:42,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,510 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-16 11:37:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:42,652 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-16 11:37:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:42,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:42,654 INFO L225 Difference]: With dead ends: 167 [2020-10-16 11:37:42,654 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 11:37:42,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 11:37:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-16 11:37:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-16 11:37:42,658 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-16 11:37:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:42,658 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-16 11:37:42,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-16 11:37:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:42,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:42,659 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:42,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,869 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-16 11:37:42,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091026565] [2020-10-16 11:37:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091026565] [2020-10-16 11:37:42,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199575159] [2020-10-16 11:37:42,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:43,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:43,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:43,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761065445] [2020-10-16 11:37:43,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:43,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:43,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:43,105 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-16 11:37:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,321 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-16 11:37:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:43,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,324 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:43,324 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:43,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-16 11:37:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-16 11:37:43,330 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-16 11:37:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:43,330 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-16 11:37:43,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-16 11:37:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:43,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:43,331 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:43,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:43,543 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-16 11:37:43,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:43,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593398134] [2020-10-16 11:37:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593398134] [2020-10-16 11:37:43,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449259566] [2020-10-16 11:37:43,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:43,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:43,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:43,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:43,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:43,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:43,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103723347] [2020-10-16 11:37:43,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:43,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:43,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:43,925 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-16 11:37:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,994 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-16 11:37:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:43,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,997 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:43,997 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:43,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-16 11:37:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-16 11:37:44,003 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-16 11:37:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:44,003 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-16 11:37:44,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-16 11:37:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:44,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:44,005 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:44,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-16 11:37:44,218 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:44,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-16 11:37:44,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:44,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835802320] [2020-10-16 11:37:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835802320] [2020-10-16 11:37:44,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332014043] [2020-10-16 11:37:44,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:44,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:44,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:44,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:44,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:44,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:44,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077326063] [2020-10-16 11:37:44,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:44,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:44,604 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:44,748 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-16 11:37:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:44,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:44,750 INFO L225 Difference]: With dead ends: 172 [2020-10-16 11:37:44,750 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:44,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-16 11:37:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:44,754 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:44,754 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:44,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:44,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:44,755 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:44,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:44,965 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-16 11:37:44,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:44,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861501423] [2020-10-16 11:37:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861501423] [2020-10-16 11:37:45,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503736357] [2020-10-16 11:37:45,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:45,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:45,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:45,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291509143] [2020-10-16 11:37:45,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:45,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:45,289 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:45,474 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:45,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:45,476 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:45,476 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:45,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-16 11:37:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-16 11:37:45,482 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-16 11:37:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:45,482 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-16 11:37:45,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-16 11:37:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:45,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:45,483 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:45,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-16 11:37:45,693 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-16 11:37:45,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:45,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106209270] [2020-10-16 11:37:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106209270] [2020-10-16 11:37:45,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182124547] [2020-10-16 11:37:45,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:45,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:45,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:45,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:45,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484466593] [2020-10-16 11:37:45,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:45,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:45,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:45,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:45,932 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-16 11:37:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:46,124 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:46,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:46,127 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:46,127 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:46,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-16 11:37:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:46,129 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:46,130 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:46,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:46,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:46,130 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:46,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:37:46,335 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-16 11:37:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:46,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325156580] [2020-10-16 11:37:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325156580] [2020-10-16 11:37:46,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544970499] [2020-10-16 11:37:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:46,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:46,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:46,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:46,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497058864] [2020-10-16 11:37:46,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:46,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:46,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:46,569 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:46,772 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-16 11:37:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:46,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:46,774 INFO L225 Difference]: With dead ends: 184 [2020-10-16 11:37:46,774 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:46,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-16 11:37:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-16 11:37:46,778 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-16 11:37:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:46,778 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-16 11:37:46,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-16 11:37:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:46,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:46,779 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:46,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 11:37:46,979 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:46,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-16 11:37:46,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:46,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888826339] [2020-10-16 11:37:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888826339] [2020-10-16 11:37:47,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136584215] [2020-10-16 11:37:47,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:47,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:47,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008581564] [2020-10-16 11:37:47,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:47,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:47,221 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-16 11:37:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:47,442 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-16 11:37:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:47,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:47,445 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:47,445 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:47,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-16 11:37:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-16 11:37:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-16 11:37:47,449 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-16 11:37:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:47,449 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-16 11:37:47,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-16 11:37:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:47,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:47,450 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,659 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-16 11:37:47,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98563874] [2020-10-16 11:37:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98563874] [2020-10-16 11:37:47,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048444078] [2020-10-16 11:37:47,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:47,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:47,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481359580] [2020-10-16 11:37:47,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:47,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:47,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:47,904 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-16 11:37:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:48,061 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-16 11:37:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:48,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:48,063 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:48,063 INFO L226 Difference]: Without dead ends: 174 [2020-10-16 11:37:48,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-16 11:37:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-16 11:37:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-16 11:37:48,067 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-16 11:37:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:48,067 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-16 11:37:48,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-16 11:37:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:48,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:48,068 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:48,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:48,277 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-16 11:37:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:48,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006056049] [2020-10-16 11:37:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006056049] [2020-10-16 11:37:48,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014685346] [2020-10-16 11:37:48,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:48,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:48,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801098180] [2020-10-16 11:37:48,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:48,531 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:48,750 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 11:37:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:48,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:48,752 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:48,753 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:48,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-16 11:37:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-16 11:37:48,756 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-16 11:37:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:48,756 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-16 11:37:48,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-16 11:37:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:48,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:48,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:48,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:48,958 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-16 11:37:48,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:48,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173231907] [2020-10-16 11:37:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173231907] [2020-10-16 11:37:49,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890657506] [2020-10-16 11:37:49,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:49,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623779340] [2020-10-16 11:37:49,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:49,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:49,205 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-16 11:37:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,401 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 11:37:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:49,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,403 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:49,403 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:49,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-16 11:37:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-16 11:37:49,407 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-16 11:37:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:49,408 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-16 11:37:49,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-16 11:37:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:49,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,408 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:49,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,609 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-16 11:37:49,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:49,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564248338] [2020-10-16 11:37:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564248338] [2020-10-16 11:37:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679300348] [2020-10-16 11:37:49,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:49,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:49,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099145742] [2020-10-16 11:37:49,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:49,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:49,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:49,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:49,886 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-16 11:37:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,956 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-16 11:37:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:49,956 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,958 INFO L225 Difference]: With dead ends: 182 [2020-10-16 11:37:49,958 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:37:49,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:37:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-16 11:37:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:37:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-16 11:37:49,962 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-16 11:37:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:49,962 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-16 11:37:49,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-16 11:37:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:49,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,963 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:50,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-16 11:37:50,175 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-16 11:37:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:50,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826254847] [2020-10-16 11:37:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826254847] [2020-10-16 11:37:50,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637309383] [2020-10-16 11:37:50,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:50,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:50,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:50,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:50,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902591578] [2020-10-16 11:37:50,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:50,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:50,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:50,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:50,452 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-16 11:37:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:50,633 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-16 11:37:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:50,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:50,635 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:50,635 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:50,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-16 11:37:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:50,639 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:50,639 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:50,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:50,640 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:50,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:50,841 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:50,842 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-16 11:37:50,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:50,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043394183] [2020-10-16 11:37:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043394183] [2020-10-16 11:37:50,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774719318] [2020-10-16 11:37:50,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:50,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:51,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:51,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769303247] [2020-10-16 11:37:51,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:51,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:51,688 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:51,919 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-16 11:37:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:51,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:51,921 INFO L225 Difference]: With dead ends: 191 [2020-10-16 11:37:51,921 INFO L226 Difference]: Without dead ends: 189 [2020-10-16 11:37:51,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-16 11:37:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-16 11:37:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-16 11:37:51,925 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-16 11:37:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:51,925 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-16 11:37:51,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-16 11:37:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:51,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:51,926 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:52,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:52,128 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-16 11:37:52,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:52,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037666862] [2020-10-16 11:37:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037666862] [2020-10-16 11:37:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613057685] [2020-10-16 11:37:52,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:52,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:52,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:52,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994704124] [2020-10-16 11:37:52,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:52,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:52,384 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:52,626 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-16 11:37:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:52,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:52,628 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:52,628 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:52,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-16 11:37:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:52,632 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:52,632 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:52,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:52,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:52,633 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:52,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-16 11:37:52,835 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-16 11:37:52,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:52,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969424614] [2020-10-16 11:37:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969424614] [2020-10-16 11:37:52,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34665268] [2020-10-16 11:37:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:52,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:52,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:52,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:52,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:53,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:53,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401815574] [2020-10-16 11:37:53,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:53,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:53,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:53,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:53,073 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:53,332 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-16 11:37:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:53,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:53,334 INFO L225 Difference]: With dead ends: 198 [2020-10-16 11:37:53,334 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:37:53,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:37:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-16 11:37:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-16 11:37:53,337 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-16 11:37:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:53,338 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-16 11:37:53,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-16 11:37:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:53,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:53,338 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:53,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,539 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-16 11:37:53,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:53,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621168377] [2020-10-16 11:37:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621168377] [2020-10-16 11:37:53,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024249818] [2020-10-16 11:37:53,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:53,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:53,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:53,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:53,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457627920] [2020-10-16 11:37:53,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:53,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:53,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:53,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:53,809 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-16 11:37:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,087 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-16 11:37:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:54,088 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,089 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:54,089 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 11:37:54,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 11:37:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-16 11:37:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-16 11:37:54,092 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-16 11:37:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,092 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-16 11:37:54,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-16 11:37:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:54,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,093 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 11:37:54,294 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,295 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-16 11:37:54,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521718899] [2020-10-16 11:37:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521718899] [2020-10-16 11:37:54,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175834496] [2020-10-16 11:37:54,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:54,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:54,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:54,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:54,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:54,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162955362] [2020-10-16 11:37:54,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:54,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:54,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:54,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:54,559 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-16 11:37:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,640 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-16 11:37:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:54,641 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,642 INFO L225 Difference]: With dead ends: 178 [2020-10-16 11:37:54,643 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 11:37:54,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 11:37:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-16 11:37:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-16 11:37:54,646 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-16 11:37:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,646 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-16 11:37:54,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-16 11:37:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:54,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,646 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:54,847 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-16 11:37:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523176573] [2020-10-16 11:37:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523176573] [2020-10-16 11:37:54,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384131736] [2020-10-16 11:37:54,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:54,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:54,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:54,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:55,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078853076] [2020-10-16 11:37:55,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:55,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:55,114 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-16 11:37:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:55,320 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-16 11:37:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:55,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:55,323 INFO L225 Difference]: With dead ends: 193 [2020-10-16 11:37:55,323 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 11:37:55,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:55,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 11:37:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-16 11:37:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-16 11:37:55,326 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-16 11:37:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:55,326 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-16 11:37:55,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-16 11:37:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:55,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:55,327 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:55,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-16 11:37:55,528 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-16 11:37:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:55,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242500371] [2020-10-16 11:37:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242500371] [2020-10-16 11:37:55,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927300326] [2020-10-16 11:37:55,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:55,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191111081] [2020-10-16 11:37:55,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:55,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:55,823 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-16 11:37:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,078 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 11:37:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:56,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,081 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:37:56,081 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:37:56,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:37:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-16 11:37:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-16 11:37:56,084 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-16 11:37:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,084 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-16 11:37:56,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-16 11:37:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:56,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,084 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:56,285 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-16 11:37:56,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753437293] [2020-10-16 11:37:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753437293] [2020-10-16 11:37:56,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193512660] [2020-10-16 11:37:56,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:56,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:56,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:56,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:56,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:56,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912207896] [2020-10-16 11:37:56,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:56,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:56,544 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-16 11:37:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,676 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-16 11:37:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:56,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,678 INFO L225 Difference]: With dead ends: 174 [2020-10-16 11:37:56,678 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:56,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-16 11:37:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-16 11:37:56,682 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-16 11:37:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,682 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-16 11:37:56,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-16 11:37:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:56,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,683 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 11:37:56,888 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-16 11:37:56,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675052799] [2020-10-16 11:37:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675052799] [2020-10-16 11:37:56,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944013899] [2020-10-16 11:37:56,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:57,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:57,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:57,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312715313] [2020-10-16 11:37:57,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:57,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:57,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:57,142 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-16 11:37:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,371 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-16 11:37:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:57,371 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,373 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:57,373 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 11:37:57,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 11:37:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-16 11:37:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-16 11:37:57,377 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-16 11:37:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,377 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-16 11:37:57,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-16 11:37:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:57,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,378 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:57,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,579 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-16 11:37:57,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:57,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766806153] [2020-10-16 11:37:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766806153] [2020-10-16 11:37:57,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023768025] [2020-10-16 11:37:57,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:57,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:57,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:57,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378040194] [2020-10-16 11:37:57,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:57,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:57,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:57,821 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,961 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-16 11:37:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:57,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,964 INFO L225 Difference]: With dead ends: 175 [2020-10-16 11:37:57,964 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 11:37:57,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 11:37:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-16 11:37:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:57,967 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,967 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:57,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:57,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,968 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:58,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,169 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-16 11:37:58,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665884692] [2020-10-16 11:37:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665884692] [2020-10-16 11:37:58,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507245266] [2020-10-16 11:37:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:58,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:58,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:58,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702328198] [2020-10-16 11:37:58,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:58,424 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:58,756 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-16 11:37:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:58,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:58,759 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:37:58,759 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 11:37:58,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 11:37:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-16 11:37:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:37:58,762 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:37:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:58,762 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:37:58,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:37:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:58,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:58,763 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:58,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,964 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,964 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-16 11:37:58,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934185953] [2020-10-16 11:37:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934185953] [2020-10-16 11:37:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058633238] [2020-10-16 11:37:59,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:59,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:59,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:59,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:59,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514826057] [2020-10-16 11:37:59,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:59,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:59,234 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:59,499 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-16 11:37:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:59,500 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:59,501 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:59,502 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:59,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-16 11:37:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:59,505 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:59,505 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:59,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:59,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:59,506 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:59,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:59,707 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-16 11:37:59,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:59,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573563384] [2020-10-16 11:37:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573563384] [2020-10-16 11:37:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764940863] [2020-10-16 11:37:59,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:59,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:59,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:59,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441908362] [2020-10-16 11:37:59,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:59,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:59,968 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:00,416 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-16 11:38:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:38:00,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:00,418 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:38:00,418 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:38:00,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:38:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:38:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:38:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:00,421 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:00,422 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:00,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:00,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:00,422 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:00,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 11:38:00,623 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-16 11:38:00,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:00,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394070768] [2020-10-16 11:38:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394070768] [2020-10-16 11:38:00,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523795997] [2020-10-16 11:38:00,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:00,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:00,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:00,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:00,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:00,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:00,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:00,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972957402] [2020-10-16 11:38:00,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:00,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:00,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:00,872 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:01,212 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:38:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:01,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:01,215 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:38:01,215 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:38:01,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:38:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:38:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-16 11:38:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-16 11:38:01,218 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-16 11:38:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:01,218 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-16 11:38:01,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-16 11:38:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:01,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:01,219 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:01,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:01,420 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:01,420 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-16 11:38:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:01,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432553791] [2020-10-16 11:38:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432553791] [2020-10-16 11:38:01,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26881597] [2020-10-16 11:38:01,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:01,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:38:01,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:01,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:01,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:01,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:01,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269793359] [2020-10-16 11:38:01,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:01,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:01,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:01,707 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-16 11:38:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:02,000 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-16 11:38:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:02,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:02,002 INFO L225 Difference]: With dead ends: 198 [2020-10-16 11:38:02,003 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:38:02,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:38:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:38:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-16 11:38:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:38:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:38:02,008 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:38:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:02,008 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:38:02,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:38:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:02,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:02,009 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:02,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 11:38:02,211 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:02,211 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-16 11:38:02,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:02,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675831975] [2020-10-16 11:38:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675831975] [2020-10-16 11:38:02,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603254687] [2020-10-16 11:38:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:02,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:02,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:02,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472752233] [2020-10-16 11:38:02,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:02,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:02,489 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:38:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:02,905 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-16 11:38:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:38:02,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:02,908 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:38:02,908 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:38:02,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:38:02,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:38:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:38:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:02,911 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:02,911 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:02,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:02,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:02,912 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:03,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:38:03,113 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-16 11:38:03,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:03,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506114974] [2020-10-16 11:38:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506114974] [2020-10-16 11:38:03,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189675221] [2020-10-16 11:38:03,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:03,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:38:03,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:03,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:03,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:03,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279676357] [2020-10-16 11:38:03,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:03,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:03,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:03,384 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:03,959 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-16 11:38:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:38:03,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:03,961 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:38:03,961 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:38:03,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:38:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:38:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-16 11:38:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:38:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-16 11:38:03,966 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-16 11:38:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:03,966 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-16 11:38:03,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-16 11:38:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:03,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:03,967 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:04,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 11:38:04,177 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:04,178 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-16 11:38:04,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:04,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541932204] [2020-10-16 11:38:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:04,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541932204] [2020-10-16 11:38:04,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950282359] [2020-10-16 11:38:04,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:04,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:38:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:04,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:06,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:06,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:06,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:06,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574573932] [2020-10-16 11:38:06,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:06,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-16 11:38:06,603 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-16 11:38:10,957 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 11:38:15,171 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-16 11:38:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:15,635 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-16 11:38:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:38:15,635 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:15,636 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:38:15,637 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 11:38:15,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-16 11:38:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 11:38:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-16 11:38:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-16 11:38:15,641 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-16 11:38:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:15,641 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-16 11:38:15,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-16 11:38:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:15,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:15,642 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:15,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:38:15,853 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-16 11:38:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:15,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398592231] [2020-10-16 11:38:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:15,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398592231] [2020-10-16 11:38:15,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738731614] [2020-10-16 11:38:15,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:15,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:15,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:16,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:16,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:17,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:17,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:38:17,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34929580] [2020-10-16 11:38:17,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:38:17,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:38:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:38:17,308 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-16 11:38:19,104 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-16 11:38:24,562 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-16 11:38:27,493 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-16 11:38:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:58,127 INFO L93 Difference]: Finished difference Result 230 states and 544 transitions. [2020-10-16 11:38:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:38:58,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:38:58,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:58,132 INFO L225 Difference]: With dead ends: 230 [2020-10-16 11:38:58,132 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:38:58,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=298, Invalid=687, Unknown=7, NotChecked=0, Total=992 [2020-10-16 11:38:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:38:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 140. [2020-10-16 11:38:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:38:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-16 11:38:58,135 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-16 11:38:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:58,135 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-16 11:38:58,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:38:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-16 11:38:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:58,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:58,135 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:58,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:58,336 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:58,337 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-16 11:38:58,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:58,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900287796] [2020-10-16 11:38:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900287796] [2020-10-16 11:38:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711397785] [2020-10-16 11:38:58,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:58,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:58,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:58,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:58,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:58,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:58,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740144840] [2020-10-16 11:38:58,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:58,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:58,598 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-16 11:38:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:58,874 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-16 11:38:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:38:58,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:58,876 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:38:58,876 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:38:58,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:38:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:38:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-16 11:38:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:38:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-16 11:38:58,880 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-16 11:38:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:58,880 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-16 11:38:58,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-16 11:38:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:58,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:58,881 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:59,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:59,082 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:59,082 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-16 11:38:59,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:59,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866903647] [2020-10-16 11:38:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:59,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866903647] [2020-10-16 11:38:59,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622699386] [2020-10-16 11:38:59,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:59,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:38:59,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:59,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:59,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603473676] [2020-10-16 11:38:59,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:59,339 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-16 11:38:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:59,636 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-16 11:38:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:38:59,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:59,638 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:38:59,638 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:38:59,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:38:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:38:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-16 11:38:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:38:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-16 11:38:59,641 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-16 11:38:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:59,641 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-16 11:38:59,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-16 11:38:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:59,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:59,642 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:59,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 11:38:59,843 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:59,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:59,843 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-16 11:38:59,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:59,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185256594] [2020-10-16 11:38:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:59,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185256594] [2020-10-16 11:38:59,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749141652] [2020-10-16 11:38:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:59,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:59,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:59,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:00,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:00,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:00,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816687205] [2020-10-16 11:39:00,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:00,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:00,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:00,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:00,106 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-16 11:39:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:00,418 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-16 11:39:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:00,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:00,420 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:39:00,420 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:39:00,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:39:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-16 11:39:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-16 11:39:00,424 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-16 11:39:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:00,424 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-16 11:39:00,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-16 11:39:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:00,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:00,425 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:00,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:39:00,626 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-16 11:39:00,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:00,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318348321] [2020-10-16 11:39:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:00,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318348321] [2020-10-16 11:39:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659831562] [2020-10-16 11:39:00,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:00,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:00,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:00,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:00,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168780107] [2020-10-16 11:39:00,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:00,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:00,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:00,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:00,968 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-16 11:39:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:01,602 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-16 11:39:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:39:01,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:01,604 INFO L225 Difference]: With dead ends: 214 [2020-10-16 11:39:01,604 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:39:01,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:39:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-16 11:39:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:39:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-16 11:39:01,611 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-16 11:39:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:01,611 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-16 11:39:01,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-16 11:39:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:01,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:01,612 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:01,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 11:39:01,813 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-16 11:39:01,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:01,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350694273] [2020-10-16 11:39:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:01,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350694273] [2020-10-16 11:39:01,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229178400] [2020-10-16 11:39:01,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:02,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:39:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:02,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:02,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:02,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433159054] [2020-10-16 11:39:02,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:02,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:02,160 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-16 11:39:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:02,583 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-16 11:39:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:02,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:02,586 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:39:02,586 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:39:02,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:39:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:39:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-16 11:39:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:02,590 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:02,590 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:02,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:02,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:02,591 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:02,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:02,792 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-16 11:39:02,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:02,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758572127] [2020-10-16 11:39:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758572127] [2020-10-16 11:39:02,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145156357] [2020-10-16 11:39:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:02,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:02,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:03,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:03,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957552015] [2020-10-16 11:39:03,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:03,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:03,056 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:03,502 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-16 11:39:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:39:03,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:03,503 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:03,503 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 11:39:03,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 11:39:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-16 11:39:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:03,507 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:03,507 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:03,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:03,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:03,508 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:03,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:03,717 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-16 11:39:03,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:03,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286815823] [2020-10-16 11:39:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286815823] [2020-10-16 11:39:03,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090043808] [2020-10-16 11:39:03,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:03,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:03,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:03,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:03,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:03,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:03,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:03,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19804031] [2020-10-16 11:39:03,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:03,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:03,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:03,979 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:04,502 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-16 11:39:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:39:04,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:04,504 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:04,504 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:39:04,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:39:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:39:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-16 11:39:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:04,508 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:04,508 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:04,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:04,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:04,508 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:04,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:39:04,709 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:04,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:04,710 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-16 11:39:04,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:04,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618906725] [2020-10-16 11:39:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:04,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618906725] [2020-10-16 11:39:04,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187097466] [2020-10-16 11:39:04,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:04,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:39:04,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:04,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:05,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:05,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:05,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032596788] [2020-10-16 11:39:05,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:05,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:05,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:05,003 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:05,636 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-16 11:39:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:39:05,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:05,637 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:39:05,637 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:39:05,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:39:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:39:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-16 11:39:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:05,641 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:05,641 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:05,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:05,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:05,642 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:05,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 11:39:05,843 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-16 11:39:05,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:05,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198729560] [2020-10-16 11:39:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198729560] [2020-10-16 11:39:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202288276] [2020-10-16 11:39:05,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:05,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:06,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:06,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:06,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471190839] [2020-10-16 11:39:06,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:06,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:06,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:06,090 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:06,594 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-16 11:39:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:39:06,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:06,595 INFO L225 Difference]: With dead ends: 221 [2020-10-16 11:39:06,595 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 11:39:06,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:39:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 11:39:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-16 11:39:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:06,600 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:06,600 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:06,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:06,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:06,601 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:06,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:06,812 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:06,812 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-16 11:39:06,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:06,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773457096] [2020-10-16 11:39:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:06,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773457096] [2020-10-16 11:39:06,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344458705] [2020-10-16 11:39:06,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:06,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:39:06,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:07,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:07,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:07,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:07,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579502489] [2020-10-16 11:39:07,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:07,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:07,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:07,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:07,059 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:07,718 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-16 11:39:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:07,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:07,720 INFO L225 Difference]: With dead ends: 240 [2020-10-16 11:39:07,720 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 11:39:07,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 11:39:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-16 11:39:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:39:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-16 11:39:07,724 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-16 11:39:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:07,724 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-16 11:39:07,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-16 11:39:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:07,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:07,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:07,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:39:07,926 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-16 11:39:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736958784] [2020-10-16 11:39:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:08,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736958784] [2020-10-16 11:39:08,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518112945] [2020-10-16 11:39:08,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:08,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:39:08,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:08,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:08,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:08,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:08,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:08,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639698339] [2020-10-16 11:39:08,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:08,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:08,270 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-16 11:39:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:09,223 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-16 11:39:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:09,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:09,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:09,225 INFO L225 Difference]: With dead ends: 238 [2020-10-16 11:39:09,226 INFO L226 Difference]: Without dead ends: 230 [2020-10-16 11:39:09,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-16 11:39:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-16 11:39:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:09,231 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:09,232 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:09,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:09,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:09,233 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:09,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:09,446 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-16 11:39:09,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:09,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529985888] [2020-10-16 11:39:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:09,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529985888] [2020-10-16 11:39:09,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489405331] [2020-10-16 11:39:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:09,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:09,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:09,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484260012] [2020-10-16 11:39:09,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:09,834 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:10,196 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-16 11:39:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:39:10,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:10,198 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:39:10,198 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:39:10,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:39:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-16 11:39:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:10,201 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:10,202 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:10,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:10,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:10,203 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:10,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-16 11:39:10,410 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-16 11:39:10,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:10,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041465070] [2020-10-16 11:39:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:10,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041465070] [2020-10-16 11:39:10,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137941701] [2020-10-16 11:39:10,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:10,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:10,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:10,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:10,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:10,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:10,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918865557] [2020-10-16 11:39:10,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:10,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:10,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:10,699 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:11,219 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-16 11:39:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:11,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:11,220 INFO L225 Difference]: With dead ends: 206 [2020-10-16 11:39:11,220 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:39:11,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:39:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-16 11:39:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-16 11:39:11,223 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-16 11:39:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:11,224 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-16 11:39:11,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-16 11:39:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:11,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:11,224 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:11,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:11,425 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-16 11:39:11,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:11,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010435179] [2020-10-16 11:39:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:11,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010435179] [2020-10-16 11:39:11,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774762988] [2020-10-16 11:39:11,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:11,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:39:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:11,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:13,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:13,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:39:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574368334] [2020-10-16 11:39:13,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:39:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:39:13,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:39:13,189 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-16 11:39:15,113 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-16 11:39:35,511 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-16 11:39:55,309 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-16 11:40:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:13,109 INFO L93 Difference]: Finished difference Result 241 states and 572 transitions. [2020-10-16 11:40:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:40:13,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:40:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:13,115 INFO L225 Difference]: With dead ends: 241 [2020-10-16 11:40:13,115 INFO L226 Difference]: Without dead ends: 236 [2020-10-16 11:40:13,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-16 11:40:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-16 11:40:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 139. [2020-10-16 11:40:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-16 11:40:13,120 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-16 11:40:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:13,120 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-16 11:40:13,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:40:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-16 11:40:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:13,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:13,121 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:13,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-16 11:40:13,332 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-16 11:40:13,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:13,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449328258] [2020-10-16 11:40:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449328258] [2020-10-16 11:40:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998817400] [2020-10-16 11:40:13,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:13,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:13,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:13,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:13,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:13,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:13,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759755375] [2020-10-16 11:40:13,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:13,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:13,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:13,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:13,618 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-16 11:40:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:13,870 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 11:40:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:13,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:13,873 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:13,873 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:13,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:40:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-16 11:40:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-16 11:40:13,876 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-16 11:40:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:13,876 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-16 11:40:13,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-16 11:40:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:13,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:13,877 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:14,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:14,078 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:14,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-16 11:40:14,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:14,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037195620] [2020-10-16 11:40:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:14,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037195620] [2020-10-16 11:40:14,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534149656] [2020-10-16 11:40:14,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:14,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:14,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:14,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:14,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823573760] [2020-10-16 11:40:14,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:14,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:14,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:14,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:14,376 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:14,723 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-16 11:40:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:14,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:14,725 INFO L225 Difference]: With dead ends: 205 [2020-10-16 11:40:14,725 INFO L226 Difference]: Without dead ends: 203 [2020-10-16 11:40:14,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-16 11:40:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-16 11:40:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-16 11:40:14,730 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-16 11:40:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:14,730 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-16 11:40:14,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-16 11:40:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:14,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:14,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:14,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:14,942 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-16 11:40:14,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:14,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725532952] [2020-10-16 11:40:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:15,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725532952] [2020-10-16 11:40:15,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814100790] [2020-10-16 11:40:15,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:15,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:15,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:15,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:15,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:15,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:15,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:15,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296862030] [2020-10-16 11:40:15,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:15,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:15,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:15,244 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-16 11:40:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:15,565 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 11:40:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:15,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:15,567 INFO L225 Difference]: With dead ends: 201 [2020-10-16 11:40:15,567 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 11:40:15,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 11:40:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-16 11:40:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-16 11:40:15,570 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-16 11:40:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:15,571 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-16 11:40:15,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-16 11:40:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:15,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:15,571 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:15,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:15,772 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-16 11:40:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:15,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747298331] [2020-10-16 11:40:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:15,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747298331] [2020-10-16 11:40:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885660806] [2020-10-16 11:40:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:16,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:16,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:16,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414262114] [2020-10-16 11:40:16,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:16,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:16,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:16,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:16,146 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-16 11:40:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:16,529 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 11:40:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:16,530 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:16,531 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:16,532 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:16,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:40:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-16 11:40:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-16 11:40:16,537 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-16 11:40:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:16,537 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-16 11:40:16,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-16 11:40:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:16,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:16,539 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:16,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 11:40:16,751 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-16 11:40:16,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:16,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120792282] [2020-10-16 11:40:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:16,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120792282] [2020-10-16 11:40:16,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224230509] [2020-10-16 11:40:16,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:16,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:16,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:16,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:17,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:17,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:17,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447616316] [2020-10-16 11:40:17,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:17,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:17,134 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:17,546 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-16 11:40:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:40:17,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:17,548 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:40:17,548 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:40:17,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:40:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-16 11:40:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-16 11:40:17,551 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-16 11:40:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:17,552 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-16 11:40:17,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-16 11:40:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:17,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:17,552 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:17,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:17,757 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-16 11:40:17,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:17,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276063957] [2020-10-16 11:40:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:17,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276063957] [2020-10-16 11:40:17,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599368555] [2020-10-16 11:40:17,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:17,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:17,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:17,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:18,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:18,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:18,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286971948] [2020-10-16 11:40:18,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:18,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:18,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:18,032 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:18,388 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-16 11:40:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:40:18,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:18,390 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:40:18,390 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:40:18,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:40:18,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-16 11:40:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 11:40:18,394 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 11:40:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:18,394 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 11:40:18,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 11:40:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:18,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:18,395 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:18,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:40:18,596 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-16 11:40:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:18,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842498586] [2020-10-16 11:40:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:18,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842498586] [2020-10-16 11:40:18,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102710260] [2020-10-16 11:40:18,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:18,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:18,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:18,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:18,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:18,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:18,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946551668] [2020-10-16 11:40:18,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:18,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:18,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:18,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:18,871 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:19,215 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 11:40:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:40:19,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:19,217 INFO L225 Difference]: With dead ends: 201 [2020-10-16 11:40:19,217 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 11:40:19,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 11:40:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-16 11:40:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-16 11:40:19,221 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-16 11:40:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:19,221 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-16 11:40:19,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-16 11:40:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:19,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:19,222 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:19,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:40:19,423 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-16 11:40:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:19,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341345512] [2020-10-16 11:40:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:19,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341345512] [2020-10-16 11:40:19,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590525094] [2020-10-16 11:40:19,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:19,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:19,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:19,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:19,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:19,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207582371] [2020-10-16 11:40:19,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:19,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:19,702 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-16 11:40:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:20,178 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-16 11:40:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:40:20,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:20,179 INFO L225 Difference]: With dead ends: 215 [2020-10-16 11:40:20,179 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 11:40:20,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:40:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 11:40:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-16 11:40:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:20,184 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:20,184 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:20,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:20,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:20,185 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:20,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:20,397 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-16 11:40:20,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:20,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945371996] [2020-10-16 11:40:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:20,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945371996] [2020-10-16 11:40:20,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581930364] [2020-10-16 11:40:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:20,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:20,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:20,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:20,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:20,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362370594] [2020-10-16 11:40:20,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:20,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:20,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:20,666 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:21,099 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-16 11:40:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:40:21,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:21,101 INFO L225 Difference]: With dead ends: 196 [2020-10-16 11:40:21,102 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 11:40:21,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:40:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 11:40:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-16 11:40:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:21,107 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:21,107 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:21,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:21,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:21,108 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:21,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:21,311 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-16 11:40:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:21,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716136746] [2020-10-16 11:40:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:21,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716136746] [2020-10-16 11:40:21,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319558408] [2020-10-16 11:40:21,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:21,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:21,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:21,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:21,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:21,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244032298] [2020-10-16 11:40:21,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:21,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:21,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:21,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:21,577 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:22,000 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-16 11:40:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:22,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:22,003 INFO L225 Difference]: With dead ends: 191 [2020-10-16 11:40:22,004 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 11:40:22,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 11:40:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-16 11:40:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:22,009 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:22,010 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:22,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:22,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:22,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:22,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 11:40:22,224 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-16 11:40:22,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:22,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609001721] [2020-10-16 11:40:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:22,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609001721] [2020-10-16 11:40:22,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427448778] [2020-10-16 11:40:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:22,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:22,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:22,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:22,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812460154] [2020-10-16 11:40:22,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:22,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:22,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:22,611 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:23,222 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-16 11:40:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:40:23,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:23,224 INFO L225 Difference]: With dead ends: 232 [2020-10-16 11:40:23,224 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 11:40:23,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 11:40:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-16 11:40:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:23,228 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:23,228 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:23,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:23,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:23,229 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:23,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:23,430 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:23,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-16 11:40:23,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:23,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001028793] [2020-10-16 11:40:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:23,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001028793] [2020-10-16 11:40:23,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949323718] [2020-10-16 11:40:23,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:23,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:23,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:23,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:23,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:23,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:23,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:23,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870412555] [2020-10-16 11:40:23,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:23,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:23,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:23,717 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:24,382 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-16 11:40:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:40:24,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:24,385 INFO L225 Difference]: With dead ends: 222 [2020-10-16 11:40:24,385 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 11:40:24,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 11:40:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-16 11:40:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:24,389 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:24,390 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:24,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:24,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:24,391 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:24,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:24,601 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-16 11:40:24,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:24,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128848332] [2020-10-16 11:40:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:24,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128848332] [2020-10-16 11:40:24,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946780928] [2020-10-16 11:40:24,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:24,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:24,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:24,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:24,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:24,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:24,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:24,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578432118] [2020-10-16 11:40:24,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:24,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:24,943 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:25,835 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-16 11:40:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:25,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:25,836 INFO L225 Difference]: With dead ends: 254 [2020-10-16 11:40:25,836 INFO L226 Difference]: Without dead ends: 246 [2020-10-16 11:40:25,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-16 11:40:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-16 11:40:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:40:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-16 11:40:25,840 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-16 11:40:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:25,841 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-16 11:40:25,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-16 11:40:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:25,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:25,842 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:26,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:26,052 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-16 11:40:26,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:26,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886704146] [2020-10-16 11:40:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886704146] [2020-10-16 11:40:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779620361] [2020-10-16 11:40:26,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:26,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:26,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:26,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:26,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359834007] [2020-10-16 11:40:26,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:26,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:26,343 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-16 11:40:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:27,177 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-16 11:40:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:27,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:27,178 INFO L225 Difference]: With dead ends: 246 [2020-10-16 11:40:27,179 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 11:40:27,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:40:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 11:40:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-16 11:40:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-16 11:40:27,184 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-16 11:40:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:27,184 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-16 11:40:27,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-16 11:40:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:27,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:27,185 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:27,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-16 11:40:27,386 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-16 11:40:27,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:27,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886975547] [2020-10-16 11:40:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:27,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886975547] [2020-10-16 11:40:27,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877270630] [2020-10-16 11:40:27,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:27,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:27,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:27,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:27,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:27,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:27,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:27,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128216398] [2020-10-16 11:40:27,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:27,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:27,703 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:28,210 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-16 11:40:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:40:28,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:28,212 INFO L225 Difference]: With dead ends: 208 [2020-10-16 11:40:28,212 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:40:28,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:40:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:40:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-16 11:40:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:40:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-16 11:40:28,217 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-16 11:40:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:28,217 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-16 11:40:28,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-16 11:40:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:28,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:28,218 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:28,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:40:28,430 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-16 11:40:28,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:28,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744561683] [2020-10-16 11:40:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744561683] [2020-10-16 11:40:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784023213] [2020-10-16 11:40:28,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:28,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:28,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575701047] [2020-10-16 11:40:28,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:28,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:28,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:28,726 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-16 11:40:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:29,318 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-16 11:40:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:40:29,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:29,320 INFO L225 Difference]: With dead ends: 215 [2020-10-16 11:40:29,320 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 11:40:29,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:40:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 11:40:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-16 11:40:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:29,324 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:29,324 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:29,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:29,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:29,324 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:29,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 11:40:29,525 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:29,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-16 11:40:29,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:29,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208744248] [2020-10-16 11:40:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:29,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208744248] [2020-10-16 11:40:29,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472847734] [2020-10-16 11:40:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:29,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:29,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:29,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:29,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:29,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618823436] [2020-10-16 11:40:29,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:29,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:29,781 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:30,406 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-16 11:40:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:30,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:30,407 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:40:30,407 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 11:40:30,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 11:40:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-16 11:40:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:30,410 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:30,410 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:30,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:30,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:30,411 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:30,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:40:30,612 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:30,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-16 11:40:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:30,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876473129] [2020-10-16 11:40:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876473129] [2020-10-16 11:40:30,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456025955] [2020-10-16 11:40:30,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:30,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:30,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:30,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:30,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:30,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:30,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:30,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880538615] [2020-10-16 11:40:30,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:30,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:30,908 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:31,642 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-16 11:40:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:31,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:31,643 INFO L225 Difference]: With dead ends: 241 [2020-10-16 11:40:31,644 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 11:40:31,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 11:40:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-16 11:40:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-16 11:40:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-16 11:40:31,647 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-16 11:40:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:31,648 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-16 11:40:31,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-16 11:40:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:31,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:31,648 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:31,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 11:40:31,857 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-16 11:40:31,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:31,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668782958] [2020-10-16 11:40:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668782958] [2020-10-16 11:40:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032222653] [2020-10-16 11:40:31,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:31,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:31,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:32,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:32,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:32,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:32,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221334210] [2020-10-16 11:40:32,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:32,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:32,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:32,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:32,143 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-16 11:40:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:32,883 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-16 11:40:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:40:32,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:32,885 INFO L225 Difference]: With dead ends: 232 [2020-10-16 11:40:32,885 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 11:40:32,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:40:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 11:40:32,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-16 11:40:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:40:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-16 11:40:32,890 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-16 11:40:32,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:32,890 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-16 11:40:32,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-16 11:40:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:32,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:32,891 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:33,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:33,101 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-16 11:40:33,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:33,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956921350] [2020-10-16 11:40:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:33,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956921350] [2020-10-16 11:40:33,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605122687] [2020-10-16 11:40:33,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:33,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:40:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:33,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:33,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:33,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 11:40:33,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570605011] [2020-10-16 11:40:33,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:40:33,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:40:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:40:33,526 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-16 11:40:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:33,868 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-16 11:40:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:40:33,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-16 11:40:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:33,871 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:40:33,871 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:40:33,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:40:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-16 11:40:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 11:40:33,877 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 11:40:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:33,877 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 11:40:33,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:40:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 11:40:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:33,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:33,878 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:34,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-16 11:40:34,091 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:34,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-16 11:40:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:34,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943355744] [2020-10-16 11:40:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:34,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943355744] [2020-10-16 11:40:34,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90832343] [2020-10-16 11:40:34,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:34,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:34,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:34,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:34,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668765038] [2020-10-16 11:40:34,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:34,623 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-16 11:40:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:34,678 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-16 11:40:34,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:40:34,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:34,680 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:40:34,680 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:40:34,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:40:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-16 11:40:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:40:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 11:40:34,683 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 11:40:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:34,684 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 11:40:34,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 11:40:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:34,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:34,684 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:34,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:40:34,885 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-16 11:40:34,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:34,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236320955] [2020-10-16 11:40:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:35,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236320955] [2020-10-16 11:40:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547553910] [2020-10-16 11:40:35,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:35,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:35,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:35,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:35,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:35,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:35,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863852343] [2020-10-16 11:40:35,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:35,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:35,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:35,313 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 11:40:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:35,405 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-16 11:40:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:40:35,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:35,406 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:40:35,407 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 11:40:35,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:40:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 11:40:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-16 11:40:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:40:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 11:40:35,410 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 11:40:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:35,410 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 11:40:35,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 11:40:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:35,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:35,411 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:35,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:35,621 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-16 11:40:35,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:35,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318658474] [2020-10-16 11:40:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:35,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318658474] [2020-10-16 11:40:35,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590579501] [2020-10-16 11:40:35,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:35,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:40:35,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:36,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:36,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:36,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888203910] [2020-10-16 11:40:36,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:36,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:36,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:36,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:36,085 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 11:40:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:36,196 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-16 11:40:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:40:36,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:36,197 INFO L225 Difference]: With dead ends: 196 [2020-10-16 11:40:36,198 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:40:36,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:40:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:40:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-16 11:40:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-16 11:40:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-16 11:40:36,201 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-16 11:40:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:36,201 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-16 11:40:36,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-16 11:40:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:36,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:36,202 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:36,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:36,402 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-16 11:40:36,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:36,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579480629] [2020-10-16 11:40:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:36,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579480629] [2020-10-16 11:40:36,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865196587] [2020-10-16 11:40:36,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:36,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:40:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:36,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:36,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:36,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460018543] [2020-10-16 11:40:36,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:36,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:36,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:36,765 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-16 11:40:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:36,908 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 11:40:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:36,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:36,910 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:40:36,910 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:36,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:40:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-16 11:40:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-16 11:40:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-16 11:40:36,913 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-16 11:40:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:36,913 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-16 11:40:36,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-16 11:40:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:36,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:36,914 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:37,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:37,115 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-16 11:40:37,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:37,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217043006] [2020-10-16 11:40:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217043006] [2020-10-16 11:40:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65699043] [2020-10-16 11:40:37,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:37,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:37,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:37,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:37,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063789330] [2020-10-16 11:40:37,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:37,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:37,491 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-16 11:40:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:37,689 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-16 11:40:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:40:37,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:37,691 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:37,691 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 11:40:37,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:40:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 11:40:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-16 11:40:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-16 11:40:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-16 11:40:37,695 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-16 11:40:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:37,696 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-16 11:40:37,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-16 11:40:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:37,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:37,696 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:37,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:37,897 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:37,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-16 11:40:37,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:37,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989460155] [2020-10-16 11:40:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:38,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989460155] [2020-10-16 11:40:38,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232986099] [2020-10-16 11:40:38,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:38,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:38,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:38,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:38,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:38,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:38,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179301045] [2020-10-16 11:40:38,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:38,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:38,278 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-16 11:40:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:38,502 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-16 11:40:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:38,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:38,503 INFO L225 Difference]: With dead ends: 193 [2020-10-16 11:40:38,503 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 11:40:38,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:40:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 11:40:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-16 11:40:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 11:40:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-16 11:40:38,507 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-16 11:40:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:38,507 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-16 11:40:38,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-16 11:40:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:38,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:38,507 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:38,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 11:40:38,708 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-16 11:40:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:38,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292063762] [2020-10-16 11:40:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:38,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292063762] [2020-10-16 11:40:38,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983844836] [2020-10-16 11:40:38,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:38,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:39,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:39,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:39,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:39,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903874021] [2020-10-16 11:40:39,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:39,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:39,068 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-16 11:40:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:39,360 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:40:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:40:39,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:39,362 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:40:39,362 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:40:39,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:40:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-16 11:40:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-16 11:40:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-16 11:40:39,367 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-16 11:40:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:39,367 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-16 11:40:39,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-16 11:40:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:39,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:39,368 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:39,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:40:39,577 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:39,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-16 11:40:39,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:39,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466237099] [2020-10-16 11:40:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:39,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466237099] [2020-10-16 11:40:39,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746274287] [2020-10-16 11:40:39,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:39,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:39,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:39,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:39,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:39,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:39,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059910759] [2020-10-16 11:40:39,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:39,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:39,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:39,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:39,975 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-16 11:40:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:40,049 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-16 11:40:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:40:40,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:40,051 INFO L225 Difference]: With dead ends: 188 [2020-10-16 11:40:40,051 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 11:40:40,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 11:40:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-16 11:40:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:40:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-16 11:40:40,054 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-16 11:40:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:40,054 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-16 11:40:40,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-16 11:40:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:40,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:40,055 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:40,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:40:40,256 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:40,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-16 11:40:40,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:40,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510693926] [2020-10-16 11:40:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510693926] [2020-10-16 11:40:40,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103374029] [2020-10-16 11:40:40,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:40,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:40,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:40,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064745081] [2020-10-16 11:40:40,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:40,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:40,617 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-16 11:40:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:40,874 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-16 11:40:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:40:40,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:40,876 INFO L225 Difference]: With dead ends: 199 [2020-10-16 11:40:40,876 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:40:40,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:40:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:40:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-16 11:40:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 11:40:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 11:40:40,879 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 11:40:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:40,879 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 11:40:40,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 11:40:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:40,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:40,880 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:41,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:40:41,081 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-16 11:40:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:41,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775347143] [2020-10-16 11:40:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775347143] [2020-10-16 11:40:41,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732884317] [2020-10-16 11:40:41,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:41,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:41,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888452188] [2020-10-16 11:40:41,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:41,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:41,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:41,523 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 11:40:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:41,857 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 11:40:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:40:41,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:41,858 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:40:41,858 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:40:41,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:41,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:40:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-16 11:40:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-16 11:40:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-16 11:40:41,861 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-16 11:40:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:41,861 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-16 11:40:41,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-16 11:40:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:41,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:41,862 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:42,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:40:42,063 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-16 11:40:42,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:42,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581692555] [2020-10-16 11:40:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581692555] [2020-10-16 11:40:42,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431569593] [2020-10-16 11:40:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:42,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:42,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:42,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:42,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:42,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:42,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97082024] [2020-10-16 11:40:42,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:42,486 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-16 11:40:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:42,847 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 11:40:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:42,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:42,848 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:40:42,849 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:40:42,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:40:42,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-16 11:40:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 11:40:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 11:40:42,853 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 11:40:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:42,853 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 11:40:42,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 11:40:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:42,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:42,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:43,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-16 11:40:43,057 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-16 11:40:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:43,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618828081] [2020-10-16 11:40:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:43,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618828081] [2020-10-16 11:40:43,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181164843] [2020-10-16 11:40:43,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:43,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:40:43,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:43,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:43,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:47,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:47,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:47,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192105567] [2020-10-16 11:40:47,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:47,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:47,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:47,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:40:47,252 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 11:40:51,481 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:40:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:51,810 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-16 11:40:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:40:51,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:51,813 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:40:51,813 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:40:51,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-16 11:40:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:40:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 11:40:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:40:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:40:51,818 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:40:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:51,819 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:40:51,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:40:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:51,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:51,819 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:52,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:52,020 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-16 11:40:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:52,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135266240] [2020-10-16 11:40:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:52,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135266240] [2020-10-16 11:40:52,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562801011] [2020-10-16 11:40:52,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:52,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:52,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:53,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:53,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:53,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248316818] [2020-10-16 11:40:53,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:53,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:53,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:53,216 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:40:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:53,653 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-16 11:40:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:40:53,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:53,655 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:40:53,655 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:40:53,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:40:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-16 11:40:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-16 11:40:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-16 11:40:53,660 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-16 11:40:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:53,660 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-16 11:40:53,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-16 11:40:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:53,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:53,661 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:53,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:53,873 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:53,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-16 11:40:53,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:53,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225321296] [2020-10-16 11:40:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225321296] [2020-10-16 11:40:54,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917024413] [2020-10-16 11:40:54,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:54,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:54,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:54,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:54,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983879014] [2020-10-16 11:40:54,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:54,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:54,265 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-16 11:40:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:54,645 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 11:40:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:54,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:54,646 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:40:54,646 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:40:54,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:40:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:40:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-16 11:40:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:40:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:40:54,650 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:40:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:54,650 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:40:54,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:40:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:54,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:54,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:54,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:54,852 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-16 11:40:54,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:54,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896686370] [2020-10-16 11:40:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896686370] [2020-10-16 11:40:54,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050964744] [2020-10-16 11:40:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:55,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:40:55,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:55,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:55,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756821973] [2020-10-16 11:40:55,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:55,215 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:40:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:55,619 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-16 11:40:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:55,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:55,624 INFO L225 Difference]: With dead ends: 224 [2020-10-16 11:40:55,624 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:40:55,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:40:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:40:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-16 11:40:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:40:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:40:55,627 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:40:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:55,627 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:40:55,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:40:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:55,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:55,628 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:55,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:55,830 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-16 11:40:55,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:55,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537193859] [2020-10-16 11:40:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537193859] [2020-10-16 11:40:55,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373495748] [2020-10-16 11:40:55,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:56,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:56,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949648866] [2020-10-16 11:40:56,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:56,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:56,198 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:40:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:56,573 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-16 11:40:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:56,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:56,575 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:40:56,575 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:40:56,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:40:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 11:40:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:40:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:40:56,579 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:40:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:56,580 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:40:56,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:40:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:56,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:56,580 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:56,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:56,781 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:56,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-16 11:40:56,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:56,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107906085] [2020-10-16 11:40:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107906085] [2020-10-16 11:40:56,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443458218] [2020-10-16 11:40:56,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:56,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:56,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:57,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:57,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975093688] [2020-10-16 11:40:57,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:57,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:57,154 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:40:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:57,474 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-16 11:40:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:57,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:57,475 INFO L225 Difference]: With dead ends: 206 [2020-10-16 11:40:57,475 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:40:57,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:40:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-16 11:40:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 11:40:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-16 11:40:57,478 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-16 11:40:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:57,479 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-16 11:40:57,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-16 11:40:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:57,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:57,479 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:57,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:40:57,680 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-16 11:40:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:57,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995791341] [2020-10-16 11:40:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995791341] [2020-10-16 11:40:57,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960641236] [2020-10-16 11:40:57,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:57,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:57,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:57,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:58,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:58,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644341930] [2020-10-16 11:40:58,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:58,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:58,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:58,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:58,073 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-16 11:40:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:58,390 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-16 11:40:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:58,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:58,391 INFO L225 Difference]: With dead ends: 207 [2020-10-16 11:40:58,392 INFO L226 Difference]: Without dead ends: 205 [2020-10-16 11:40:58,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-16 11:40:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-16 11:40:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:40:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-16 11:40:58,394 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-16 11:40:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:58,395 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-16 11:40:58,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-16 11:40:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:58,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:58,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:58,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:40:58,596 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-16 11:40:58,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:58,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385351497] [2020-10-16 11:40:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385351497] [2020-10-16 11:40:58,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139295996] [2020-10-16 11:40:58,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:58,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:58,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:58,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:58,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:58,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:58,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501671546] [2020-10-16 11:40:58,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:58,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:58,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:58,981 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-16 11:40:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:59,312 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-16 11:40:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:40:59,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:59,313 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:40:59,314 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:40:59,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:40:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-16 11:40:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 11:40:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-16 11:40:59,317 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-16 11:40:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:59,317 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-16 11:40:59,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-16 11:40:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:59,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:59,318 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:59,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:40:59,519 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-16 11:40:59,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:59,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392900002] [2020-10-16 11:40:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392900002] [2020-10-16 11:40:59,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064011224] [2020-10-16 11:40:59,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:59,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:59,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:59,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:59,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:59,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:59,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834495313] [2020-10-16 11:40:59,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:59,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:59,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:59,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:59,979 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-16 11:41:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:00,428 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-16 11:41:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:00,429 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:00,430 INFO L225 Difference]: With dead ends: 223 [2020-10-16 11:41:00,430 INFO L226 Difference]: Without dead ends: 221 [2020-10-16 11:41:00,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-16 11:41:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-16 11:41:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 11:41:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-16 11:41:00,434 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-16 11:41:00,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:00,434 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-16 11:41:00,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-16 11:41:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:00,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:00,435 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:00,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:41:00,636 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-16 11:41:00,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:00,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534945844] [2020-10-16 11:41:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:00,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534945844] [2020-10-16 11:41:00,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095957621] [2020-10-16 11:41:00,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:00,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:00,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:01,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:01,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:01,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601162141] [2020-10-16 11:41:01,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:01,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:01,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:01,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:01,021 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-16 11:41:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:01,383 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-16 11:41:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:01,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:01,385 INFO L225 Difference]: With dead ends: 225 [2020-10-16 11:41:01,385 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 11:41:01,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 11:41:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-16 11:41:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-16 11:41:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-16 11:41:01,389 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-16 11:41:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:01,389 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-16 11:41:01,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-16 11:41:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:01,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:01,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:01,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,591 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-16 11:41:01,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:01,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883160170] [2020-10-16 11:41:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:01,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883160170] [2020-10-16 11:41:01,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290504821] [2020-10-16 11:41:01,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:02,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:02,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542791849] [2020-10-16 11:41:02,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:02,013 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-16 11:41:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:02,377 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-16 11:41:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:02,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:02,378 INFO L225 Difference]: With dead ends: 214 [2020-10-16 11:41:02,379 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:41:02,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:41:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-16 11:41:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 11:41:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-16 11:41:02,382 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-16 11:41:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:02,382 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-16 11:41:02,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-16 11:41:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:02,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:02,383 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:02,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:02,584 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-16 11:41:02,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:02,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255397478] [2020-10-16 11:41:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255397478] [2020-10-16 11:41:02,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813438356] [2020-10-16 11:41:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:02,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:02,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:03,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:03,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487354333] [2020-10-16 11:41:03,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:03,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:03,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:03,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:03,014 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-16 11:41:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:03,277 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-16 11:41:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:03,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:03,278 INFO L225 Difference]: With dead ends: 203 [2020-10-16 11:41:03,278 INFO L226 Difference]: Without dead ends: 201 [2020-10-16 11:41:03,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-16 11:41:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-16 11:41:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 11:41:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-16 11:41:03,282 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-16 11:41:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:03,282 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-16 11:41:03,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-16 11:41:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:03,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:03,283 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:03,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-16 11:41:03,484 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:03,484 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-16 11:41:03,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:03,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078531242] [2020-10-16 11:41:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078531242] [2020-10-16 11:41:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648257719] [2020-10-16 11:41:03,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:03,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:03,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:03,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:03,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303064249] [2020-10-16 11:41:03,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:03,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:03,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:03,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:03,953 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:04,031 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 11:41:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:04,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:04,032 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:41:04,032 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:41:04,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:41:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-16 11:41:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 11:41:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-16 11:41:04,036 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-16 11:41:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:04,036 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-16 11:41:04,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-16 11:41:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:04,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:04,037 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:04,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:04,238 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:04,238 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-16 11:41:04,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:04,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293699932] [2020-10-16 11:41:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:04,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293699932] [2020-10-16 11:41:04,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19833102] [2020-10-16 11:41:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:04,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:04,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:04,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:04,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:04,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:04,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468200405] [2020-10-16 11:41:04,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:04,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:04,703 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-16 11:41:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:04,982 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-16 11:41:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:04,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:04,984 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:41:04,984 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:41:04,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:41:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-16 11:41:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 11:41:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 11:41:04,989 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 11:41:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:04,989 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 11:41:04,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 11:41:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:04,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:04,990 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:05,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:05,200 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-16 11:41:05,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:05,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958909856] [2020-10-16 11:41:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958909856] [2020-10-16 11:41:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091318100] [2020-10-16 11:41:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:05,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:05,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:05,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:05,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:06,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:06,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:06,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030112754] [2020-10-16 11:41:06,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:06,350 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 11:41:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:06,730 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-16 11:41:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:06,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:06,732 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:41:06,732 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:41:06,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:41:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-16 11:41:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 11:41:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-16 11:41:06,736 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-16 11:41:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:06,737 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-16 11:41:06,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-16 11:41:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:06,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:06,737 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:06,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:06,940 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:06,940 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-16 11:41:06,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:06,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820686674] [2020-10-16 11:41:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820686674] [2020-10-16 11:41:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920010303] [2020-10-16 11:41:07,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:07,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:07,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:07,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:07,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:07,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:07,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077702413] [2020-10-16 11:41:07,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:07,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:07,373 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-16 11:41:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:07,853 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-16 11:41:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:07,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:07,855 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:41:07,855 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:41:07,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:41:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-16 11:41:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 11:41:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 11:41:07,858 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 11:41:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:07,858 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 11:41:07,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 11:41:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:07,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:07,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:08,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-16 11:41:08,061 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-16 11:41:08,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:08,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207874525] [2020-10-16 11:41:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:08,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207874525] [2020-10-16 11:41:08,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617547693] [2020-10-16 11:41:08,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:11,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:11,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:11,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693196970] [2020-10-16 11:41:11,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:11,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:11,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:11,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:11,562 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 11:41:15,814 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:41:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:16,223 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-16 11:41:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:16,225 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:16,225 INFO L225 Difference]: With dead ends: 237 [2020-10-16 11:41:16,226 INFO L226 Difference]: Without dead ends: 235 [2020-10-16 11:41:16,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-16 11:41:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-16 11:41:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-16 11:41:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:16,230 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:16,230 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:16,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:16,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:16,231 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:16,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:41:16,432 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-16 11:41:16,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:16,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292011257] [2020-10-16 11:41:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:16,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292011257] [2020-10-16 11:41:16,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732526174] [2020-10-16 11:41:16,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:16,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:16,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:16,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:17,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:17,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:17,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187953893] [2020-10-16 11:41:17,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:17,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:17,732 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 11:41:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:18,272 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-16 11:41:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:18,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:18,274 INFO L225 Difference]: With dead ends: 229 [2020-10-16 11:41:18,274 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 11:41:18,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 11:41:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-16 11:41:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 11:41:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-16 11:41:18,278 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-16 11:41:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:18,278 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-16 11:41:18,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-16 11:41:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:18,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:18,279 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:18,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 11:41:18,480 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-16 11:41:18,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:18,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239644095] [2020-10-16 11:41:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239644095] [2020-10-16 11:41:18,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073479728] [2020-10-16 11:41:18,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:18,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:18,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:18,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:18,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:18,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93658203] [2020-10-16 11:41:18,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:18,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:18,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:18,894 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-16 11:41:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:19,468 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-16 11:41:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:19,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:19,470 INFO L225 Difference]: With dead ends: 225 [2020-10-16 11:41:19,470 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 11:41:19,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:41:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 11:41:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-16 11:41:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:19,474 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:19,474 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:19,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:19,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:19,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:19,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 11:41:19,676 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-16 11:41:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:19,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099073894] [2020-10-16 11:41:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099073894] [2020-10-16 11:41:19,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856475109] [2020-10-16 11:41:19,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:19,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:19,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:20,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:20,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805823629] [2020-10-16 11:41:20,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:20,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:20,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:20,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:20,192 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 11:41:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:21,175 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-16 11:41:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:41:21,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:21,178 INFO L225 Difference]: With dead ends: 239 [2020-10-16 11:41:21,179 INFO L226 Difference]: Without dead ends: 237 [2020-10-16 11:41:21,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:41:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-16 11:41:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-16 11:41:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:21,184 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:21,184 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:21,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:21,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:21,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:21,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 11:41:21,398 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-16 11:41:21,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:21,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026476535] [2020-10-16 11:41:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:21,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026476535] [2020-10-16 11:41:21,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458995808] [2020-10-16 11:41:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:21,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:21,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:21,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370807971] [2020-10-16 11:41:21,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:21,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:21,843 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 11:41:22,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:22,332 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-16 11:41:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:22,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:22,334 INFO L225 Difference]: With dead ends: 234 [2020-10-16 11:41:22,334 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 11:41:22,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 11:41:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-16 11:41:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:22,338 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:22,338 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:22,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:22,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:22,339 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:22,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-16 11:41:22,547 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-16 11:41:22,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:22,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918817922] [2020-10-16 11:41:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:22,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918817922] [2020-10-16 11:41:22,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124297914] [2020-10-16 11:41:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:22,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:22,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:22,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:22,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:22,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949465492] [2020-10-16 11:41:22,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:22,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:22,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:22,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:22,984 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 11:41:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:23,412 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-16 11:41:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:23,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:23,414 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:41:23,414 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:41:23,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:41:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-16 11:41:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:41:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-16 11:41:23,418 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-16 11:41:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:23,418 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-16 11:41:23,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-16 11:41:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:23,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:23,419 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:23,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:23,620 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-16 11:41:23,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:23,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889685515] [2020-10-16 11:41:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:23,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889685515] [2020-10-16 11:41:23,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756539760] [2020-10-16 11:41:23,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:24,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:24,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:24,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129536441] [2020-10-16 11:41:24,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:24,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:24,102 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-16 11:41:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:24,257 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-16 11:41:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:24,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:24,259 INFO L225 Difference]: With dead ends: 208 [2020-10-16 11:41:24,259 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:41:24,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:41:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-16 11:41:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-16 11:41:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-16 11:41:24,263 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-16 11:41:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:24,263 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-16 11:41:24,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-16 11:41:24,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:24,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:24,263 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:24,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:24,464 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-16 11:41:24,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:24,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054567182] [2020-10-16 11:41:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054567182] [2020-10-16 11:41:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507573105] [2020-10-16 11:41:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:24,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:24,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:24,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:24,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:24,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:24,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543238479] [2020-10-16 11:41:24,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:24,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:24,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:24,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:24,903 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-16 11:41:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:25,270 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-16 11:41:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:25,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:25,272 INFO L225 Difference]: With dead ends: 229 [2020-10-16 11:41:25,272 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 11:41:25,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 11:41:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-16 11:41:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-16 11:41:25,277 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-16 11:41:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:25,277 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-16 11:41:25,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-16 11:41:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:25,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:25,278 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:25,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:25,479 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-16 11:41:25,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:25,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538514943] [2020-10-16 11:41:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:25,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538514943] [2020-10-16 11:41:25,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790049678] [2020-10-16 11:41:25,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:25,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:25,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:25,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:25,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:25,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:25,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760234522] [2020-10-16 11:41:25,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:25,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:25,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:25,954 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-16 11:41:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:26,413 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-16 11:41:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:26,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:26,415 INFO L225 Difference]: With dead ends: 235 [2020-10-16 11:41:26,415 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 11:41:26,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 11:41:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-16 11:41:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-16 11:41:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-16 11:41:26,418 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-16 11:41:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:26,418 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-16 11:41:26,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-16 11:41:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:26,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:26,419 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:26,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:26,620 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-16 11:41:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:26,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772718835] [2020-10-16 11:41:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772718835] [2020-10-16 11:41:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412933096] [2020-10-16 11:41:26,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:26,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:27,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:27,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:27,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973766419] [2020-10-16 11:41:27,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:27,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:27,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:27,057 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-16 11:41:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:27,585 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-16 11:41:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:27,586 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:27,586 INFO L225 Difference]: With dead ends: 233 [2020-10-16 11:41:27,586 INFO L226 Difference]: Without dead ends: 231 [2020-10-16 11:41:27,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-16 11:41:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-16 11:41:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-16 11:41:27,591 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-16 11:41:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:27,591 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-16 11:41:27,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-16 11:41:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:27,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:27,592 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:27,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:27,803 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-16 11:41:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:27,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889881443] [2020-10-16 11:41:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:27,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889881443] [2020-10-16 11:41:27,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357086388] [2020-10-16 11:41:27,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:27,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:27,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:31,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:31,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:31,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654554427] [2020-10-16 11:41:31,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:31,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:31,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:31,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:31,442 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. Received shutdown request... [2020-10-16 11:41:33,697 WARN L210 SmtUtils]: Removed 1 from assertion stack [2020-10-16 11:41:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:33,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:33,899 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:41:33,903 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:41:33,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:41:33 BasicIcfg [2020-10-16 11:41:33,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:41:33,905 INFO L168 Benchmark]: Toolchain (without parser) took 273769.93 ms. Allocated memory was 145.2 MB in the beginning and 208.7 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 105.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:33,905 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-16 11:41:33,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 717.60 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 99.5 MB in the beginning and 161.6 MB in the end (delta: -62.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:33,906 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.90 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 159.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:33,906 INFO L168 Benchmark]: Boogie Preprocessor took 36.78 ms. Allocated memory is still 201.9 MB. Free memory was 159.5 MB in the beginning and 158.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:33,907 INFO L168 Benchmark]: RCFGBuilder took 389.13 ms. Allocated memory is still 201.9 MB. Free memory was 158.2 MB in the beginning and 137.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:33,907 INFO L168 Benchmark]: TraceAbstraction took 272575.00 ms. Allocated memory was 201.9 MB in the beginning and 208.7 MB in the end (delta: 6.8 MB). Free memory was 137.1 MB in the beginning and 105.5 MB in the end (delta: 31.6 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:33,908 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 717.60 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 99.5 MB in the beginning and 161.6 MB in the end (delta: -62.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.90 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 159.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.78 ms. Allocated memory is still 201.9 MB. Free memory was 159.5 MB in the beginning and 158.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 389.13 ms. Allocated memory is still 201.9 MB. Free memory was 158.2 MB in the beginning and 137.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 272575.00 ms. Allocated memory was 201.9 MB in the beginning and 208.7 MB in the end (delta: 6.8 MB). Free memory was 137.1 MB in the beginning and 105.5 MB in the end (delta: 31.6 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 561 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.1s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (163states) and FLOYD_HOARE automaton (currently 8 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 2050ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 272.4s, OverallIterations: 177, TraceHistogramMax: 6, AutomataDifference: 167.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2299 SDtfs, 16006 SDslu, 15426 SDs, 0 SdLazy, 10932 SolverSat, 3892 SolverUnsat, 34 SolverUnknown, 0 SolverNotchecked, 71.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4365 GetRequests, 830 SyntacticMatches, 150 SemanticMatches, 3384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17173 ImplicationChecksByTransitivity, 141.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 176 MinimizatonAttempts, 8006 StatesRemovedByMinimization, 176 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 57.9s InterpolantComputationTime, 4306 NumberOfCodeBlocks, 4306 NumberOfCodeBlocksAsserted, 537 NumberOfCheckSat, 3960 ConstructedInterpolants, 9 QuantifiedInterpolants, 411183 SizeOfPredicates, 169 NumberOfNonLiveVariables, 14616 ConjunctsInSsa, 1641 ConjunctsInUnsatCore, 346 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1656 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown